MAX1605ETT-MAX1605ETT+-MAX1605ETT+T-MAX1605EUT#G16-MAX1605EUT#TG16 Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1605EUT#G16 ,30V Internal Switch LCD Bias SupplyApplications Ordering InformationLCD Bias GeneratorsTEMP PIN- SOTPARTRANGE PACKAGE MARKCellular/Cor ..
MAX1605EUT#TG16 ,30V Internal Switch LCD Bias Supplyfeatures include a low quiescent supply cur-6-Pin TDFNrent and a shutdown mode to save power. The6- ..
MAX1605EUT-T ,30V Internal Switch LCD Bias SupplyFeaturesThe MAX1605 boost converter contains a 0.5A internal Adjustable Output Voltage up to 30Vsw ..
MAX1606EUA ,28V Internal Switch LCD Bias Supply with True ShutdownFeaturesThe MAX1606 is a step-up DC-DC converter that con- Adjustable Output Voltage up to 28Vtain ..
MAX1606EUA ,28V Internal Switch LCD Bias Supply with True ShutdownApplicationsLCD Bias GeneratorsPART TEMP. RANGE PIN-PACKAGECellular or Cordless PhonesMAX1606EUA -4 ..
MAX1606EUA ,28V Internal Switch LCD Bias Supply with True ShutdownELECTRICAL CHARACTERISTICS(V = 3.3V, V = BATT = SHDN, T = 0°C to +85°C, unless otherwise noted. Typ ..
MAX4304ESA ,Low-noise, low-distortion op amp. Bandwidth 740MHz. Minimum stable gain 2V/V.ELECTRICAL CHARACTERISTICS(V = +5V, V = -5V, V = 0, R = 100kΩ, T = T to T , unless otherwise noted. ..
MAX4304ESA ,Low-noise, low-distortion op amp. Bandwidth 740MHz. Minimum stable gain 2V/V.ApplicationsMAX4305 10 340 5-pin SOT23, 8-pin SOVideo Buffers and Cable DriversUltrasoundOrdering I ..
MAX4305ESA+ ,740MHz, Low-Noise, Low-Distortion Op Amps in SOT23-5applications. These op amps also feature a wideoutput voltage swing of ±3.7V and ±70mA output curre ..
MAX4308ESA ,400MHz / Ultra-Low-Distortion Op AmpsFeaturesThe MAX4108/MAX4109/MAX4308/MAX4309 op amps' High Speed:combine ultra-high-speed performanc ..
MAX4309ESA ,400MHz / Ultra-Low-Distortion Op AmpsGeneral Description ________
MAX430CPA ,【15V Chopper-Stabilized Operational AmplifierApplications Precision Amplifiers Signal Conditioning for: Thermocouples Strain Gauges, Load Ce ..

MAX1605ETT-MAX1605ETT+-MAX1605ETT+T-MAX1605EUT#G16-MAX1605EUT#TG16
30V Internal Switch LCD Bias Supply
19-1666; Rev 1; 10/030V Internal Switch LCDBias Supplyneral Description
The MAX1605 boost converter contains a 0.5A internal
switch in a tiny 6-pin SOT23 package. The IC operates
from a +2.4V to +5.5V supply voltage, but can boost
battery voltages as low as 0.8V up to 30V at the output.
The MAX1605 uses a unique control scheme providing
the highest efficiency over a wide range of load condi-
tions. An internal 0.5A MOSFET reduces external com-
ponent count, and a high switching frequency (up to
500kHz) allows for tiny surface-mount components. The
current limit can be set to 500mA, 250mA, or 125mA,
allowing the user to reduce the output ripple and com-
ponent size in low-current applications.
Additional features include a low quiescent supply cur-
rent and a shutdown mode to save power. The
MAX1605 is ideal for small LCD panels with low current
requirements, but can also be used in other applica-
tions. A MAX1605EVKIT evaluation kit (EV kit) is avail-
able to help speed up design time.
Applications
LCD Bias Generators
Cellular/Cordless Phones
Palmtop Computers
Personal Digital Assistants (PDAs)
Organizers
Handy Terminals
FeaturesAdjustable Output Voltage up to 30V20mA at 20V from a Single Li+ Battery88% EfficiencyUp to 500kHz Switching FrequencySelectable Inductor Current Limit
(125mA, 250mA, or 500mA)18μA Operating Supply Current0.1μA Shutdown CurrentAvailable in Two Small Packages
6-Pin TDFN
6-Pin SOT23
VIN = 0.8V TO VOUT
VCC = 2.4V TO 5.5V VOUT = VIN TO 30V
OFFSHDN
VCC
LIM
GND
MAX1605
10μH
Pin ConfigurationTypical Operating Circuit
VCCGND6FBLIM
SHDN
MAX1605
SOT23
TOP VIEW4LX
LIMMAX1605VCC
GND
SHDN1
TDFN
3mm ✕ 3mm
Ordering Information
PARTTEMP
RANGE
PIN-
PACKAGE
SOT
MARK
MAX1605EUT-T -40°C to +85°C6 SOT23-6AAHP
MAX1605ETT-T -40°C to +85°C6 TDFNABW
0V Internal Switch LCDBias SupplyABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= SHDN= 3.3V, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
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.
VCC, FB, LIM, SHDNto GND....................................-0.3V to +6V
LX to GND..............................................................-0.3V to +32V
Continuous Power Dissipation (TA= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C)...........696mW
6-Pin TDFN (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
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply VoltageVCC(Note 2)2.45.5V
Inductor Input Voltage RangeVIN(Note 2)0.8VOUTV
VCC Undervoltage LockoutVUVLOVCC falling, 50mV typical hysteresis2.02.22.37V
Quiescent Supply CurrentICCVFB = 1.3V1835μA
Shutdown Supply CurrentSHDN = GND0.11μA
VCC Line Regulation∆VLNRVOUT = 18V, ILOAD = 1mA, VIN = 5V,
VCC = VLIM = 2.4V to 5.5V0.1%/V
VIN Line Regulation∆VLNRVOUT = 18V, ILOAD = 1mA,
VCC = VLIM = 5V, VIN = 2.4V to 12V0.15%/V
Load Regulation∆VLDRVOUT = 18V, VCC = VIN = VLIM = 5V,
ILOAD = 0mA to 20mA0.1%/mA
EfficiencyL1 = 100μH, VIN = 3.6V, ILOAD = 10mA88%
Feedback Set PointVFB1.2251.251.275V
Feedback Input Bias CurrentIFBVFB = 1.3V5100nA
LX Voltage RangeVLX30.5V
LIM = VCC0.400.500.56
LIM = floating0.200.250.285LX Switch Current LimitILX(MAX)
LIM = GND0.100.1250.15
VCC = 5V, ILX = 100mA0.8LX On-ResistanceRLXVCC = 3.3V, ILX = 100mA12Ω
LX Leakage CurrentVLX = 30.5V2μA
Maximum LX On-TimetON101316μs
VFB > 1.1V0.81.01.2Minimum LX Off-TimetOFFVFB < 0.8V (soft-start)3.95.06.0μs
0V Internal Switch LCDBias SupplyELECTRICAL CHARACTERISTICS
(VCC= SHDN= 3.3V, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
ELECTRICAL CHARACTERISTICS (continued)
(VCC= SHDN= 3.3V, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
CONTROL INPUTS
VIH2.4V ≤ VCC ≤ 5.5V0.8 ×
VCC
SHDN Input Threshold
VIL2.4V ≤ VCC ≤ 5.5V0.2 ×
VCC
SHDN Input Bias CurrentISHDNVCC = 5.5V, V SHDN = 0 to 5.5V-11μA
LIM Input Low Level2.4V ≤ VCC ≤ 5.5V0.4V
LIM Input Float Level2.4V ≤ VCC ≤ 5.5V,
ILIM = ±0.5μAV C C / 2) -
0.2V V C C / 2) 0.2V V
LIM Input High Level2.4V ≤ VCC ≤ 5.5VVCC
- 0.4VV
SHDN = VCC, LIM = GND or VCC-22LIM Input Bias CurrentILIMSHDN = GND0.11μA
PARAMETERSYMBOLCONDITIONSMINMAXUNITS
Supply VoltageVCC(Note 2)2.45.5V
Inductor Input Voltage RangeVIN(Note 2)0.8VOUTV
VCC Undervoltage LockoutVUVLOVCC falling, 50mV typical hysteresis2.02.37V
Quiescent Supply CurrentICCVFB = 1.3V35μA
Shutdown Supply CurrentSHDN = GND1μA
Feedback Set PointVFB1.2151.285V
Feedback Input Bias CurrentIFBVFB = 1.3V100nA
LX Voltage RangeVLX30.5V
LIM = VCC0.350.58
LIM = floating0.180.30LX Switch Current LimitILX(MAX)
LIM = GND0.080.17
LX On-ResistanceRLXVCC = 3.3V, ILX = 100mA2Ω
LX Leakage CurrentVLX = 30.5V2μA
Maximum LX On-TimetON917μs
VFB > 1.1V0.751.25Minimum LX Off-TimetOFFVFB < 0.8V3.86.0μs
CONTROL INPUTS
VIH2.4V ≤ VCC ≤ 5.5V0.8 ×
VCC
SHDN Input Threshold
VIL2.4V ≤ VCC ≤ 5.5V0.2 ×
VCC
SHDN Input Bias CurrentISHDNVCC = 5.5V, VSHDN = 0 to 5.5V-11μA
0V Internal Switch LCDBias SupplyX1605 toc04
SUPPLY VOLTAGE (V)
(%
EFFICIENCY vs. SUPPLY VOLTAGE
(L1 = 10μH)VIN = 3.6V
ILIM = 500mA
IOUT = 5mA
IOUT = 1mA
IOUT = 10mA63912
EFFICIENCY vs. INPUT VOLTAGE
(L1 = 10μH)
1605 toc05
INPUT VOLTAGE (V)
(%
VCC = 3.3V
ILIM = 500mA
IOUT = 5mA
IOUT = 1mA510152025
EFFICIENCY vs. LOAD CURRENT
(L1 = 10μH)
1605 toc06
LOAD CURRENT (mA)
(%
LIM = GND
(125mA)
LIM = OPEN
(250mA)
LIM = VCC
(500mA)
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
1605 toc01
SUPPLY VOLTAGE (V)
(V
VIN = 3.6V
LIM = VCC
(500mA)
IOUT = 5mA
IOUT = 1mA
OUTPUT VOLTAGE vs. INPUT VOLTAGE
AX1605 toc02
INPUT VOLTAGE (V)
(V
VCC = 3.3V
LIM = VCC
(500mA)
IOUT = 5mA
IOUT = 1mA
OUTPUT VOLTAGE
vs. LOAD CURRENT
AX1605 toc03
LOAD CURRENT (mA)
(V
LIM = VCC
(500mA)
LIM = GND
(125mA)LIM = OPEN
(250mA)
Typical Operating Characteristics
(VCC= 3.3V, VIN= 3.6V, L1 = 10μH, SHDN= LIM = VCC, VOUT(NOM) = 18V (Figure 3), TA= +25°C, unless otherwise noted.)
Note 1:All devices are 100% tested at TA= +25°C. All limits over the temperature range are guaranteed by design.
Note 2:The MAX1605 requires a supply voltage between +2.4V and +5.5V; however, the input voltage used to power the inductor
can vary from +0.8V to VOUT.
ELECTRICAL CHARACTERISTICS (continued)
(VCC= SHDN= 3.3V, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINMAXUNITS
LIM Input Low Level2.4V ≤ VCC ≤ 5.5V0.4V
LIM Input Float Level2.4V ≤ VCC ≤ 5.5V,
ILIM = ±0.5μA
(VCC / 2)
- 0.25V
(VCC / 2)
+ 0.25VV
LIM Input High Level2.4V ≤ VCC ≤ 5.5VVCC
- 0.4VV
SHDN = VCC, LIM = GND or VCC-22LIM Input Bias CurrentILIMSHDN = GND1μA
Typical Operating Characteristics (continue
(VCC= 3.3V, VIN= 3.6V, L1 = 10μH, SHDN= LIM = VCC, VOUT(NOM) = 18V (Figure 3), TA= +25°C, unless otherwise noted.)510152025
EFFICIENCY vs. LOAD CURRENT
(L1 = 47μH)
X1605 toc07
LOAD CURRENT (mA)
(%
LIM = GND
(125mA)
LIM = OPEN
(250mA)
LIM = VCC
(500mA)
CURRENT LIMIT vs. SUPPLY VOLTAGE
AX1605 toc09
SUPPLY VOLTAGE (V)
(m
LIM = OPEN
LIM = GND
LIM = VCC
CURRENT LIMIT vs. INPUT VOLTAGE
1605 toc10
INPUT VOLTAGE (V)
(m
LIM = OPEN
LIM = VCC
LIM = GND21345
SUPPLY CURRENT
vs. SUPPLY VOLTAGE (NO-LOAD)
AX1605 toc11
SUPPLY VOLTAGE (V)
(μ
1605 toc12
LOAD CURRENT (mA)
(m
SUPPLY CURRENT vs. LOAD CURRENT
LIM = GND
(125mA)
LIM = OPEN
(250mA)
LIM = VCC
(500mA)
17.9V
18.1V2
200μs/div
LINE TRANSIENT
MAX1605 toc13
A: VIN = VCC = 2.4V TO 5.5V
B: VOUT = 18V, ROUT = 3.6kΩ1
17.9V
500mA
18.1V
18V
10mA
40μs/div
LOAD TRANSIENT
MAX1605 toc14
VOUT = 18V, IOUT = 1mA TO 10mA
VCC = 3.3V, VIN = 3.6V510152025
EFFICIENCY vs. LOAD CURRENT
(L1 = 100μH)
X1605 toc08
LOAD CURRENT (mA)
(%
LIM = OPEN
(250mA)
LIM = VCC
(500mA)
LIM = GND
(125mA)
10V
20V
500mA
250mA
200μs/div
SHUTDOWN WAVEFORM
MAX1605 toc15
VOUT = 18V, ROUT = 1.8kΩ
VCC = 3.3V, VIN = 3.6V0V Internal Switch LCDBias Supply
0V Internal Switch LCDBias SupplyPin Description
PINNAMEFUNCTIONSHDNActive-Low Shutdown Input. A logic low shuts down the device and reduces the supply current
to 0.1μA. Connect SHDN to VCC for normal operation.VCCIC Supply Voltage (+2.4V to +5.5V). Bypass VCC to GND with a 0.1μF or greater capacitor.GNDGroundLXInductor Connection. The drain of an internal 30V N-channel MOSFET. LX is high impedance in
shutdown.LIMInductor Current Limit Selection. Connect LIM to VCC for 500mA, leave LIM floating for 250mA,
or connect LIM to GND for 125mA.FBFeedback Input. Connect to a resistive-divider network between the output (VOUT) and FB to set
the output voltage between VIN and 30V. The feedback threshold is 1.25V.tailed Description
The MAX1605 compact, step-up DC-DC converter oper-
ates from a +2.4V to +5.5V supply. Consuming only
18μA of supply current, the device includes an internal
switching MOSFET with 1Ωon-resistance and selectable
current limit (Figure 1). During startup, the MAX1605
extends the minimum off-time, limiting initial surge cur-
rent. The MAX1605 also features a shutdown mode.
Control Scheme
The MAX1605 features a minimum off-time, current-lim-
ited control scheme. The duty cycle is governed by a
pair of one-shots that set a minimum off-time and a
maximum on-time. The switching frequency can be up
to 500kHz and depends upon the load and input volt-
age. The peak current limit of the internal N-channel
MOSFET is pin selectable and may be set at 125mA,
250mA, or 500mA (Figure 2).
SHDNON
OFF
VCC = 2.4V TO 5.5V
VOUT = VIN TO 30V
CONTROL
LOGIC
ERROR
AMPLIFIER
1.25V
GND
VCC
COUT
10μH
LIM
VIN = 0.8V TO VOUT
CFF
SHUTDOWN
LOGIC
CURRENT
LIMIT
MAX1605
Figure 1. Functional Diagram

Partno	Mfg	Dc	Qty	Available	Descript
MAX1605ETT	MAXIM	N/a	2500	avai	30V Internal Switch LCD Bias Supply
MAX1605ETT+ \|MAX1605ETT	MAXIM	N/a	1550	avai	30V Internal Switch LCD Bias Supply
MAX1605ETT+T \|MAX1605ETTT	MAXIM	N/a	2166	avai	30V Internal Switch LCD Bias Supply
MAX1605EUT#G16	MAIXM	N/a	2500	avai	30V Internal Switch LCD Bias Supply
MAX1605EUT#TG16	N/A	N/a	2500	avai	30V Internal Switch LCD Bias Supply