MAX1760EUB+-MAX1760EUB+T-MAX1760EUB-T-MAX1760HETB+T-MAX1760HEUB+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1760EUB+ ,0.8A, Low-Noise, 1MHz, Step-Up DC-DC ConverterApplicationsU10-2MAX1760HEUB 10 µMAX HighDigital Cordless Phones PCS Phones*EP = Exposed paddle.Wir ..
MAX1760EUB+ ,0.8A, Low-Noise, 1MHz, Step-Up DC-DC ConverterApplicationsU10-2MAX1760HEUB 10 µMAX HighDigital Cordless Phones PCS Phones*EP = Exposed paddle.Wir ..
MAX1760EUB+T ,0.8A, Low-Noise, 1MHz, Step-Up DC-DC ConverterELECTRICAL CHARACTERISTICS(CLK/SEL = FB = PGND = GND, ISET = REF, OUT = POUT, V = 3.6V, T = 0°C to ..
MAX1760EUB-T ,0.8A, Low-Noise, 1MHz, Step-Up DC-DC ConverterELECTRICAL CHARACTERISTICS (continued)(CLK/SEL = FB = PGND = GND, ISET = REF, OUT = POUT, V = 3.6V, ..
MAX1760EUB-T ,0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converterapplications. The♦ Low-Noise, Constant-Frequency Operation (1MHz)MAX1760 is activated by a logic-lo ..
MAX1760EUB-T ,0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converterapplications. They combine low quies-♦ Up to 800mA Outputcent supply current (100µA) with a high 1M ..
MAX4583ESE ,Low-Voltage, CMOS Analog Multiplexers/SwitchesMAX4581/MAX4582/MAX458319-1328; Rev 1; 10/99Low-Voltage, CMOS AnalogMultiplexers/Switches__________ ..
MAX4583ESE ,Low-Voltage, CMOS Analog Multiplexers/SwitchesFeaturesThe MAX4581/MAX4582/MAX4583 are low-voltage, ♦ Pin Compatible with Industry-Standard CMOS a ..
MAX4583ESE+ ,Low-Voltage, CMOS Analog Multiplexers/SwitchesGeneral Description ________
MAX4583ESE+T ,Low-Voltage, CMOS Analog Multiplexers/SwitchesGeneral Description ________
MAX4583LEEE+ ,Low-Voltage, CMOS Analog Multiplexers/SwitchesEVALUATION KIT AVAILABLEMAX4581L/MAX4582L/ Low-Voltage, CMOS Analog MAX4583L Multiplexers/Switches
MAX4583LEEE+ ,Low-Voltage, CMOS Analog Multiplexers/SwitchesElectrical Characteristics(V = +12V ±5%, V = 2.0V, V = 0.8V, T = T to T , unless otherwise noted. T ..

MAX1760EUB+-MAX1760EUB+T-MAX1760EUB-T-MAX1760HETB+T-MAX1760HEUB+
0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter
General Description
The MAX1760/MAX1760H are high-efficiency, low-noise,
step-up DC-DC converters intended for use in battery-
powered wireless applications. They combine low quies-
cent supply current (100µA) with a high 1MHz operating
frequency. Small external components and tiny 10-pin
TDFN and µMAX®packages make this device an excel-
lent choice for small hand-held applications. The
MAX1760 is activated by a logic-low ONsignal while the
MAX1760H is activated by a logic-high ON input.
Both devices use a synchronous-rectified pulse-width-
modulation (PWM) boost topology to generate 2.5V to
5.5V outputs from a wide range of inputs, such as 1 to 3
alkaline or NiCd/NiMH cells or a single lithium-ion (Li+)
cell. Proprietary Idle-Mode™ circuitry significantly
improves light-load efficiency and smoothly transitions to
fixed-frequency PWM operation at higher load currents.
Low-noise, forced-PWM mode is available for applica-
tions requiring constant-frequency operation at all load
currents. PWM operation can also be synchronized to
an external clock to protect sensitive frequency bands
in communications equipment. Analog soft-start and
adjustable current limit permit optimization of efficiency,
external component size, and output voltage ripple.
Applications
Digital Cordless PhonesPCS Phones
Wireless HandsetsHandheld Instruments
Palmtop ComputersPersonal Communicators
Two-Way Pagers
FeaturesUp to 94% Efficiency0.7V to 5.5V Input RangeUp to 800mA OutputFixed 3.3V Output (or Adjustable from 2.5V to 5.5V)PWM Synchronous-Rectified TopologyLow-Noise, Constant-Frequency Operation (1MHz)0.1µA Logic-Controlled ShutdownSynchronizable Switching FrequencyAdjustable Current LimitAdjustable Soft-Start10-Pin µMAX Package10-Pin 3mm x 3mm TDFN Package
MAX1760/MAX1760H
0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
POUT
PGNDFB
GND
REF
ISET
μMAX
TOP VIEW
CLK/SELOUT
ON (ON)
(ON) FOR MAX1760H
POUT
ON (ON)
GND
REF
ISETPGND4FBCLK/SEL5OUT
TDFN
(3mm x 3mm)
MAX1760
MAX1760H
MAX1760
MAX1760H
PGNDFBGND
POUT
ISET
OUTREF
CLK/SEL
INPUT = 0.7V
TO VOUT
VOUT = 3.3V,
800mA
MAX1760
Typical Operating Circuit
19-1660; Rev 3; 1/07
EVALUATION KIT
AVAILABLE
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Idle Mode is a trademark of Maxim Integrated Products, Inc.
Pin Configurations
Ordering Information
PARTPIN-
PACKAGE
LOGICPKG CODE
MAX1760ETB10 TDFN-EP*LowT1033-1
MAX1760EUB10 µMAXLowU10-2
MAX1760HETB10 TDFN-EP*HighT1033-1
MAX1760HEUB10 µMAXHighU10-2
*EP = Exposed paddle.
Note:All devices are specified over the -40°C to +85°C operating
temperature range.
MAX1760/MAX1760H
0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(CLK/SEL = FB = PGND = GND, ISET = REF, OUT = POUT, VOUT= 3.6V, TA= 0°C to +85°C. Typical values are at TA= +25°C,
unless otherwise noted.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ON, ON, OUT, CLK/SEL to GND..................................-0.3V to +6V
PGND to GND..........................................................................±0.3V
LX to PGND.................................................-0.3V to (VPOUT+ 0.3V)
POUT to OUT...........................................................................±0.3V
REF, FB, ISET, POUT to GND.......................-0.3V to (VOUT+ 0.3V)
Continuous Power Dissipation (TA= +70°C)
Single-Layer Board:
10-Pin µMAX
(derate 5.6mW/°C above +70°C).................................….444mW
10-Pin TDFN-EP (derate 18.5mW/°C above +70°C).....1482mW
Multilayer Board:
10-Pin µMAX (derate 8.8mW/°C above +70°C)..........….707mW
10-Pin TDFN-EP (derate 24.4mW/°C above +70°C).....1951mW
Operating Temperature Range................................-40°C to +85°C
Junction Temperature...........................................................+150°C
Storage Temperature Range.................................-65°C to +150°C
Lead Temperature (soldering, 10s)......................................+300°C
PARAMETERCONDITIONSMINTYPMAXUNITS
DC-DC CONVERTER
Input Voltage Range(Note 1)0.75.5V
Minimum Startup VoltageILOAD < 1mA, TA = +25°C (Note 2)0.91.1V
Temperature Coefficient of Startup VoltageILOAD < 1mA-2.3mV/°C
Frequency in Startup ModeVOUT = 1.5V1255001000kHz
Internal Oscillator FrequencyCLK/SEL = OUT0.811.2MHz
Oscillator Maximum Duty Cycle(Note 3)808690%
External Clock Frequency Range0.51.2MHz
Output VoltageVFB < 0.1V, CLK/SEL = OUT, includes load
regulation for 0 < ILX < 0.55A3.173.33.38V
FB Regulation VoltageAdjustable output, CLK/SEL = OUT, includes
load regulation for 0 < ILX < 0.55A1.2151.2401.270V
FB Input Leakage CurrentVFB = 1.35V (TA = +25°C, MAX1760ETB,
MAX1760HETB)0.01100nA
Load RegulationCLK/SEL = OUT, no load to full load
(0 < ILX < 1.0A)-1.5%
Output Voltage Adjust Range2.55.5V
Output Voltage Lockout ThresholdRising edge (Note 4)2.002.152.30V
ISET Input Leakage CurrentVISET = 1.25V (TA = +25°C, MAX1760ETB,
MAX1760HETB)±0.01±50nA
Supply Current in ShutdownV ON = 3.6V, VON = 0V0.15µA
No-Load Supply CurrentCLK/SEL = GND (Note 5)100185µA
No-Load Supply Current Forced-PWM ModeCLK/SEL = OUT2.5mA
DC-DC SWITCHES
POUT Leakage CurrentVLX = 0, VOUT = 5.5V (TA = +25°C,
MAX1760ETB, MAX1760HETB)0.110µA
LX Leakage CurrentVLX = VOUT = 5.5V, in shutdown (TA =
+25°C, MAX1760ETB, MAX1760HETB)0.110µA
MAX1760/MAX1760H
0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
ELECTRICAL CHARACTERISTICS
(CLK/SEL = FB = PGND = GND, ISET = REF, OUT = POUT, VOUT= 3.6V, TA= -40°C to +85°C,unless otherwise noted.) (Note 7)
ELECTRICAL CHARACTERISTICS (continued)
(CLK/SEL = FB = PGND = GND, ISET = REF, OUT = POUT, VOUT= 3.6V, TA= 0°C to +85°C. Typical values are at TA= +25°C,
unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
N-channel0.150.28Switch On-ResistanceP-channel0.250.45Ω
N-Channel Current Limit1.01.251.6A
P-Channel Turn-Off CurrentCLK/SEL = GND2060120mA
REFERENCES
Reference Output VoltageIREF = 01.2301.2501.270V
Reference Load Regulation-1µA < IREF < +50µA515mV
Reference Supply Rejection2.5V < VOUT < 5V0.25mV
LOGIC INPUTS
CLK/SEL Input Low Level2.5V ≤ VOUT ≤ 5.5V0.2 x
VOUTV
CLK/SEL Input High Level2.5V ≤ VOUT ≤ 5.5V0.8 x
VOUTV
1.1V ≤ VOUT ≤ 1.8V0.2ON, ON Input Low Level (Note 6)1.8V ≤ VOUT ≤ 5.5V0.4V
1.1V ≤ VOUT ≤ 1.8VVOUT
- 0.2ON, ON Input High Level (Note 6)
1.8V ≤ VOUT ≤ 5.5V1.6
Input Leakage CurrentCLK/SEL, ON, ON (TA = +25°C,
MAX1760ETB, MAX1760HETB)0.011µA
Minimum CLK/SEL Pulse Width200ns
Maximum CLK/SEL Rise/Fall Time100ns
PARAMETERCONDITIONSMINMAXUNITS
DC-DC CONVERTER
Output VoltageVFB < 0.1V, CLK/SEL = OUT, includes load
regulation for 0 < ILX < 0.55A3.173.38V
FB Regulation VoltageAdjustable output, CLK/SEL = OUT, includes
load regulation for 0 < ILX < 0.55A1.2151.270V
Internal Oscillator FrequencyCLK/SEL = OUT0.751.2MHz
Oscillator Maximum Duty Cycle(Note 3)8090%
Output Voltage Lockout ThresholdRising edge (Note 4)2.002.30V
Supply Current in ShutdownV ON = 3.6V5µA
No-Load Supply CurrentCLK/SEL = GND (Note 5)185µA
DC-DC SWITCHES
N-channel0.28Switch On-ResistanceP-channel0.45Ω
MAX1760/MAX1760H
0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
Note 1:Operating voltage—since the regulator is bootstrapped to the output, once started, the MAX1760 operates down
to 0.7V input.
Note 2:Startup is tested with the circuit shown in Figure 6.
Note 3:Defines maximum step-up ratio.
Note 4:The regulator is in startup mode until this voltage is reached. Do not apply full load current until the output exceeds 2.3V.
Note 5:Supply current into the OUT pin. This current correlates directly to the actual battery-supply current, but is reduced in
value according to the step-up ratio and efficiency.
Note 6:ON(MAX1760) and ON (MAX1760H) have a hysteresis of approximately 0.15 ×VOUT.
Note 7:Specifications to -40°C are guaranteed by design and not production tested.
EFFICIENCY vs. OUTPUT CURRENT
VOUT = 3.3V
MAX1760 toc01
OUTPUT CURRENT (A)
EFFICIENCY (%)40
A: VIN = 2.4V
B: VIN = 1.2V
C: VIN = 0.9V
= AUTO MODE
= FPWM MODE
MAX1760-02
EFFICIENCY vs. OUTPUT CURRENT
VOUT = 5V
OUTPUT CURRENT (A)
EFFICIENCY (%)40
A: VIN = 3.6V
B: VIN = 2.4V
C: VIN = 1.2V
= AUTO MODE
= FPWM MODEB
MAXIMUM OUTPUT CURRENT
vs. INPUT VOLTAGE
MAX1760-03
INPUT VOLTAGE (V)
OUTPUT CURRENT (A)
VOUT = 3.3V
VOUT = 5V
ELECTRICAL CHARACTERISTICS (continued)
(CLK/SEL = FB = PGND = GND, ISET = REF, OUT = POUT, VOUT= 3.6V, TA= -40°C to +85°C,unless otherwise noted.) (Note 7)
Typical Operating Characteristics
(Circuit of Figure 2, VIN= 2.4V, VOUT= 3.3V, TA= +25°C, unless otherwise noted.)
PARAMETERCONDITIONSMINMAXUNITS
N-Channel Current Limit1.01.6A
REFERENCE
Reference Output VoltageIREF = 01.2301.270V
LOGIC INPUTS
CLK/SEL Input Low Level2.5V ≤ VOUT ≤ 5.5V0.2 x
VOUTV
CLK/SEL Input High Level2.5V ≤ VOUT ≤ 5.5V0.8 x
VOUTV
1.1V ≤ VOUT ≤ 1.8V0.2ON, ON Input Low Level (Note 6)1.8V ≤ VOUT ≤ 5.5V0.4V
1.1V ≤ VOUT ≤ 1.8VVOUT + 0.2ON, ON Input High Level (Note 6)1.8V ≤ VOUT ≤ 5.5V1.6V
Input Leakage CurrentCLK/SEL, ON, ON1µA
MAX1760/MAX1760H
0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
NO-LOAD BATTERY CURRENT
vs. INPUT VOLTAGE
MAX1760-04
INPUT VOLTAGE (V)
INPUT CURRENT (mA)
VOUT = 3.3V
VOUT = 5V
TOTAL SHUTDOWN CURRENT
(ILX + IOUT) vs. INPUT VOLTAGE
MAX1760-05
INPUT VOLTAGE (V)
SHUTDOWN CURRENT (nA)
INTERNAL OSCILLATOR
FREQUENCY vs. TEMPERATURE
MAX1760-06
TEMPERATURE (°C)
FREQUENCY (MHz)
STARTUP VOLTAGE
vs. OUTPUT CURRENT
MAX1760-07
OUTPUT CURRENT (A)
STARTUP VOLTAGE (V)
CIRCUIT OF FIGURE 6AB
B = +25°C
C = -40°C
A = +85°C
PEAK INDUCTOR CURRENT vs. VISET
MAX1760-08
VISET (V)
PEAK INDUCTOR CURRENT (A)
HEAVY-LOAD SWITCHING WAVEFORMS
MAX1760-09
A = LX PIN, 5V/div
B = INDUCTOR CURRENT, 200mA/div
C = OUTPUT RIPPLE, 50mV/div AC-COUPLED
t = 400ns/div
LIGHT-LOAD SWITCHING WAVEFORMS
MAX1760-10
t = 400ns/div
A = LX PIN, 5V/div
B = INDUCTOR CURRENT, 200mA/div
C = OUTPUT RIPPLE, 50mV/div, AC-COUPLED
LOAD-TRANSIENT RESPONSE
MAX1760-11
t = 200ms/div
VIN = 1.1V, VOUT = 3.3V, IOUT = 0 AND 0.2A
A = IOUT, 100mA/div
B = VOUT, 50mV/div, AC-COUPLED
LINE-TRANSIENT RESPONSE
MAX1760-12
400μs/div
VIN = 2.4V TO 1.4V, IOUT = 70mA
A = VIN, 1V/div
B = VOUT, 5mA/div, AC-COUPLED
Typical Operating Characteristics (continued)
(Circuit of Figure 2, VIN= 2.4V, VOUT= 3.3V, TA= +25°C, unless otherwise noted.)
MAX1760H Enable Input. When ON is high, the IC is on. Connect to OUT for normal operation.MAX1760/MAX1760H
0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
NOISE SPECTRUM
MAX1760-1310.1
FREQUENCY (MHz)
NOISE (mV
RMS
TURN-ON WAVEFORMS
NO SOFT-START COMPONENTS
MAX1760-14
t = 2ms/div
A = ON, 5V/div
B = INPUT CURRENT, 500mA/div
C = VOUT, 2V/div
SOFT-START WAVEFORMS
RSS = 500kΩ, CSS = 0.1μF
MAX1760-15
2.00ms/div
A = ON, 5V/div
B = INPUT CURRENT, 100mA/div
C = VOUT, 2V/div
Pin Descriptionypical Operating Characteristics (continued)
(Circuit of Figure 2, VIN= 2.4V, VOUT= 3.3V, TA= +25°C, unless otherwise noted.)
NAMEFUNCTIONISET
N-Channel Current-Limit Control. For maximum current limit, connect to REF. To reduce current, supply a
voltage between REF and GND by means of a resistive voltage-divider. If soft-start is desired, connect a
capacitor from ISET to GND. When ON= high, or VREF<80% of nominal value, an on-chip 100kΩswitched
resistor discharges this pin to GND. REF1.250V Voltage Reference Bypass. Connect a 0.22µF ceramic bypass capacitor to GND. Up to 50µA of
external load current is allowed.
PINGNDGround. Connect to PGND with short trace. FBDC-DC Converter Feedback Input. To set fixed output voltage of +3.3V, connect FB to ground. For
adjustable output of 2.5V to 5.5V, connect to a resistive divider from OUT to GND. FB set point = 1.24V.LXInductor ConnectionPGNDSource of N-Channel Power MOSFET SwitchCLK/SEL
Clock Input for the DC-DC Converter. Also serves to program operating mode of switcher as follows:
CLK/SEL = LO:Normal operation—operates at a fixed frequency, automatically switching to low-power
mode if load is minimized.
CLK/SEL = HI:Forced-PWM mode—operates in low-noise, constant-frequency mode at all loads.
CLK/SEL = Clocked:Forced-PWM mode with the internal oscillator synchronized to CLK in 500kHz to
1200kHz range.OUTIC Power, Supplied from the Output. Bypass to GND with a 0.68µF ceramic capacitor, and connect to POUT
with a series 4.7Ωresistor (Figure 2).POUTPower Output. P-channel synchronous-rectifier source.EPExposed Paddle (TDFN Package Only). Internally connected to GND. Connect to a large ground plane to
maximize thermal dissipation. Do not use as sole ground connection.MAX1760 Enable Input. When ONis low, the IC is on. Connect to GND for normal operation.
MAX1760/MAX1760H
0.8A, Low-Noise, 1MHz,
Step-Up DC-DC Converter
Detailed Description
The MAX1760 is a highly efficient, low-noise power sup-
ply for portable RF and hand-held instruments. It com-
bines a boost switching regulator, N-channel power
MOSFET, P-channel synchronous rectifier, precision
reference, and shutdown control (Figure 1).
The DC-DC converter boosts a 1-cell to 3-cell battery
voltage input to a fixed 3.3V or adjustable voltage
between 2.5V and 5.5V. An external Schottky diode is
required for output voltages greater than 4V. The
MAX1760 guarantees startup with an input voltage as
low as 1.1V and remains operational down to an input
of just 0.7V. It is optimized for use in cellular phones
and other applications requiring low noise and low qui-
escent current for maximum battery life. It features
fixed-frequency operation at medium and heavy loads,
but at light loads, switches only as needed for optimum
efficiency. This device is also capable of constant-fre-
quency (1MHz), low-noise PWM operation at all load
currents, or frequency-synchronized PWM operation
when connected to an external clock. Table 1 lists
some typical outputs. Shutdown reduces quiescent cur-
rent to just 1µA. Figure 2 shows the standard applica-
tion circuit for the MAX1760.
Step-Up Converter
During DC-DC converter operation, the internal N-chan-
nel MOSFET switch turns on for the first part of each
cycle, allowing current to ramp up in the inductor and
store energy in a magnetic field. During the second
part of each cycle, the MOSFET turns off and inductor
current flows through the synchronous rectifier to the
2.15V
IC POWER
1.25VREFERENCE
UNDERVOLTAGE LOCKOUT
STARTUP
OSCILLATOR
OSCILLATOR
1MHz
CONTROLLER
MODE
PCH
NCHD
POUT
PGND
OSCOSC
MODECLK/SEL
ISETFB
REF
ISET
GND
CLK/SELRDY
REFGND
(MAX1760H)
OUT
MAX1760
(MAX1760)
Figure 1. Functional DiagramPGNDGND
POUT
ISET
OUT
REF
CLK/SEL
VIN = 2.4V
VOUT = 3.3V,
800mA
MAX1760
3.3μH
0.68μF
4.7Ω
33μF
0.22μF
100μF
Figure 2. Standard Application Circuit

Partno	Mfg	Dc	Qty	Available	Descript
MAX1760EUB+	MAIXM	N/a	2500	avai	0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1760EUB+ \|MAX1760EUB	MAXIM	N/a	30	avai	0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1760EUB+T \|MAX1760EUBT	MAXIM	N/a	461	avai	0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1760EUB-T \|MAX1760EUBT	MAX	N/a	120	avai	0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1760EUB-T \|MAX1760EUBT		N/a	1243	avai	0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1760EUB-T \|MAX1760EUBT	MAXIM	N/a	2487	avai	0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1760HETB+T \|MAX1760HETBT	MAXIM	N/a	2185	avai	0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1760HETB+T \|MAX1760HETBT	MAXIM Pb-free	N/a	331	avai	0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1760HEUB+ \|MAX1760HEUB	MAXIM	N/a	166	avai	0.8A, Low-Noise, 1MHz, Step-Up DC-DC Converter