MAX619CSA+-MAX619CSA+T-MAX619ESA+-MAX619ESA+T-MAX619ESA-T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX619ESA-T ,Regulated 5V Charge Pump DC-DC ConverterGeneral Description ________
MAX619ESA-T ,Regulated 5V Charge Pump DC-DC ConverterMAX61919-0227; Rev 2; 5/96Regulated 5V Charge-PumpDC-DC Converter_______________
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MAX619CSA+-MAX619CSA+T-MAX619ESA+-MAX619ESA+T-MAX619ESA-T
Regulated 5V Charge Pump DC-DC Converter
_______________General Description
The MAX619 step-up charge-pump DC-DC converter
delivers a regulated 5V ±4% output at 50mA over tem-
perature. The input voltage range is 2V to 3.6V (two
battery cells).
The complete MAX619 circuit fits into less than 0.1in2of
board space because it requires only four external
capacitors: two 0.22mF flying capacitors, and 10mF
capacitors at the input and output.
Low operating supply current (150mA max) and low
shutdown supply current (1mA max) make this device
ideal for small, portable, and battery-powered applica-
tions. When shut down, the load is disconnected from
the input.
The MAX619 is available in 8-pin DIP and SO packages.
________________________Applications
Two Battery Cells to 5V Conversion
Local 3V-to-5V Conversion
Portable Instruments & Handy-Terminals
Battery-Powered Microprocessor-Based Systems
5V Flash Memory Programmer
Minimum Component DC-DC Converters
Remote Data-Acquisition Systems
Compact 5V Op-Amp Supply
Regulated 5V Supply from Lithium Backup Battery
Switching Drive Voltage for MOSFETs in
Low-Voltage Systems
____________________________FeaturesRegulated 5V ±4% Charge PumpOutput Current Guaranteed over Temperature
20mA (VIN‡2V)
50mA (VIN‡3V)2V to 3.6V Input RangeNo Inductors; Very Low EMI NoiseUltra-Small Application Circuit (0.1in2)Uses Small, Inexpensive Capacitors500kHz Internal OscillatorLogic-Controlled 1mA Max Shutdown
Supply Current Shutdown Disconnects Load from Input8-Pin DIP and SO Packages
_______________Ordering Information
* Dice are specified at TA = +25°C.gulated 5V Charge-Pump
DC-DC Converter
________________________________________________________________Maxim Integrated Products1
MAX619
DIP/SO
C1+
OUT
C2+
C1-
SHDN
GND
C2-
TOP VIEW
__________________Pin Configuration
MAX619
OUT
C2+
C2-
IN
SHDN
C1+
C1-
INPUT
2V to 3.6V
ON/OFF
0.22mF
OUTPUT
5V, 20mA
10mF10mF
0.22mF
GND
__________Typical Operating Circuit
19-0227; Rev 2; 5/96
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
& the latest literature: http://,
PARTTEMP. RANGEPIN-PACKAGE
MAX619CPA0°C to +70°C8 Plastic DIP
MAX619CSA0°C to +70°C8 SO
MAX619C/D0°C to +70°CDice*
MAX619EPA-40°C to +85°C8 Plastic DIP
MAX619ESA-40°C to +85°C8 SO
MAX619MJA-55°C to +125°C8 CERDIP
Regulated 5V Charge-Pump
DC-DC Converter________________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN= 2V to 3.6V, C1 = C2 = 0.22mF, C3 = C4 = 10μF, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
Note 1:The MAX619 is not short-circuit protected.
PARAMETERSYMBOLMINTYPMAXUNITS
No-Load Supply Current75170mA
0.021Shutdown Supply
Current10mA
Input VoltageVIN23.6V
EfficiencyEff%
Switching Frequency500kHz
VIH0.7 x VINSHDN Input ThresholdVIL0.4VSHDN Input CurrentIIH±10mA
CONDITIONS
VIN= 3V, IOUT= 30mA
2V ≤VIN ≤3.6V, IOUT = 0mA
VIN= 2V, IOUT= 20mA
2V ≤VIN ≤3.6V, IOUT = 0mA,
VSHDN = VIN
VIN= 3V, IOUT= 20mA
At full load
VSHDN= VIN
VINto GND............................................................-0.3V to +5.5V
VOUTto GND.........................................................-0.3V to +5.5V
SHDN to GND..............................................-0.3V to (VIN+ 0.3V)
IOUTContinuous (Note 1)..................................................120mA
Continuous Power Dissipation (TA= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C)............727mW
SO (derate 5.88mW/°C above +70°C).........................471mW
CERDIP (derate 8.00mW/°C above +70°C).................640mW
Operating Temperature Ranges
MAX619C_ _.......................................................0°C to +70°C
MAX619E_ _....................................................-40°C to +85°C
MAX619MJA..................................................-55°C to +125°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering, 10sec).............................+300°C
MAX619C/E
MAX619M
MAX619C/E
MAX619M
IIN
2.0V ≤VIN≤3.6V, 0mA ≤IOUT≤20mA
3.0V ≤VIN≤3.6V, 0mA ≤IOUT≤50mA, MAX619C
3.0V ≤VIN≤3.6V, 0mA ≤IOUT≤45mA, MAX619E
Output RippleVRIPPLE100mVNo load to full load
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.
3.0V ≤VIN≤3.6V, 0mA ≤IOUT≤40mA, MAX619M
Output VoltageVOUT4.85.05.2V
gulated 5V Charge-PumpDC-DC Converter
________________________________________________________________________________________3
TOP TRACE: OUTPUT CURRENT, 0mA to 25mA, 10mA/div
BOTTOM TRACE: OUTPUT VOLTAGE, 5mV/div, AC-COUPLED
2ms/div
LOAD-TRANSIENT RESPONSE
RLOAD = 250W, VOUT = 5V, IOUT = 20mA
TOP TRACE: VIN = 2V to 3V, 1V/div
BOTTOM TRACE: OUTPUT VOLTAGE, 50mV/div, AC-COUPLED
2ms/div
LINE-TRANSIENT RESPONSE (IOUT = 20mA)
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)10100
EFFICIENCY vs. OUTPUT CURRENT
AND INPUT VOLTAGE
IOUT (mA)
(%
VIN = 1.8V
VIN = 3.0V
VIN = 2.0V
VIN = 3.3V
VIN = 3.6V
VIN = 2.4V
VIN = 2.7V
INPUT CURRENT vs. OUTPUT CURRENT
IOUT (mA)
IIN
(m2030405060708090100
160
VINIOUT
MAX
NO-LOAD INPUT CURRENT
vs. INPUT VOLTAGE
VIN (V)
IIN
(m
SHDN = VIN
SHDN = 0V
OUTPUT VOLTAGE vs. OUTPUT CURRENT
IOUT (mA)
(V
VIN = 1.8V
VIN = 2.0V
VIN = 3.3V
VIN = 2.4V, 2.7V
= 3.6VVIN = 3.6V
VIN = 3.0V
OUTPUT VOLTAGE vs. INPUT VOLTAGE
VIN (V)
(V
IOUT = 20mA
EFFICIENCY vs. INPUT VOLTAGE
VIN (V)
(%
IOUT = 10mA
2.02.53.03.54.0
Regulated 5V Charge-Pump
DC-DC Converter________________________________________________________________________________________
_______________Detailed Description
Operating Principle
The MAX619 provides a regulated 5V output from a 2V
to 3.6V (two battery cells) input. Internal charge pumps
and external capacitors generate the 5V output, elimi-
nating the need for inductors. The output voltage is
regulated to 5V ±4% by a pulse-skipping controller that
turns on the charge pump when the output voltage
begins to droop.
To maintain the greatest efficiency over the entire input
voltage range, the MAX619’s internal charge pump
operates as a voltage doubler when VINranges from
3.0V to 3.6V, and as a voltage tripler when VINranges
from 2.0V to 2.5V. When VINranges from 2.5V to 3.0V,
_____________________Pin Descriptionthe MAX619 switches between doubler and tripler
mode on alternating cycles, making a 2.5 x VINcharge
pump. To further enhance efficiency over the input
range, an internal comparator selects the higher of VIN
or VOUTto run the MAX619’s internal circuitry.
Efficiency with VIN= 2V and IOUT= 20mA is typically
80%.
Figure 1 shows a detailed block diagram of the
MAX619. In tripler mode, when the S1 switches close,
the S2 switches open and capacitors C1 and C2
charge up to VIN. On the second half of the cycle, C1
and C2 are connected in series between IN and OUT
when the S1 switches open and the S2 switches close,
as shown in Figure 1. In doubler mode, only C2 is
used.
During one oscillator cycle, energy is transferred from
the input to the charge-pump capacitors, and then
from the charge-pump capacitors to the output capaci-
tor and load. The number of cycles within a given time
frame increases as the load increases or as the input
supply voltage decreases. In the limiting case, the
charge pumps operate continuously, and the oscillator
frequency is nominally 500kHz.
Shutdown Mode
The MAX619 enters low-power shutdown mode when
SHDN is a logic high. SHDN is a CMOS-compatible
input. In shutdown mode, the charge-pump switching
action is halted, OUT is disconnected from IN, and
VOUTfalls to 0V. Connect SHDN to ground for normal
operation. When VIN= 3.6V, VOUTtypically reaches
5V in 0.5ms under no-load conditions after SHDN goes
low.
FUNCTIONNAMEPIN
Negative Terminal for C1C1-8
Active-High CMOS Logic-Level Shutdown InputSHDN7
GroundGND6
Negative Terminal for C2C2-5
Positive Terminal for C2C2+4
+5V Output Voltage. VOUT= 0V when in
shutdown mode.OUT3
Input Supply VoltageIN2
Positive Terminal for C1C1+1
gulated 5V Charge-PumpDC-DC Converter
________________________________________________________________________________________5
C3
10µF
C2
0.22µF
C1
0.22µF
C2-
C1+
S1D
C1-
S1C
S2C
S2B
S1B
S1A
S2A
SWITCH
CONTROL
BUS
VIN/VOUT
IC
POWER
GND
SWITCHES SHOWN IN TRIPLER MODE, DISCHARGE CYCLE
CONTROL
LOGIC
10µF
OUT
VREF
SHDN
C2+
MAX619
Figure 1. Block Diagram
Regulated 5V Charge-Pump
DC-DC Converter________________________________________________________________________________________
Table 1. Capacitor Suppliers
* Note: (SM) denotes surface-mount component, (TH) denotes through-hole component.
__________Applications Information
Capacitor Selection
Charge-Pump Capacitors C1 and C2
The values of charge-pump capacitors C1 and C2 are
critical to ensure adequate output current and avoid
excessive peak currents. Use values in the range of
0.22mF to 1.0mF. Larger capacitors (up to 50mF) can
be used, but larger capacitors will increase output rip-
ple. Ceramic or tantalum capacitors are recommend-
ed.
Input and Output Capacitors, C3 and C4
The type of input bypass capacitor (C3) and output fil-
ter capacitor (C4) used is not critical, but it does affect
performance. Tantalums, ceramics, or aluminum elec-
trolytics are suggested. For smallest size, use Sprague
595D106X0010A2 surface-mount capacitors, which
measure 3.7mm x 1.8mm (0.146in x 0.072in). For low-
est ripple, use large, low effective-series-resistance
(ESR) ceramic or tantalum capacitors. For lowest cost,
use aluminum electrolytic or tantalum capacitors.
Figure 2 shows the component values for proper oper-
ation using minimal board space. The input bypass
capacitor (C3) and output filter capacitor (C4) should
both be at least 10mF when using aluminum electrolyt-
ics or Sprague’s miniature 595D series of tantalum chip
capacitors.
When using ceramic capacitors, the values of C3 and
C4 can be reduced to 2mF and 1mF, respectively. If the
input supply source impedance is very low, C3 may not
be necessary.
Many capacitors exhibit 40% to 50% variation over
temperature. Compensate for capacitor temperature
coefficient by selecting a larger nominal value to
ensure proper operation over temperature. Table 1 lists
capacitor suppliers.
MAX619
C4
10µF
C1+
C1–
OUT
SHDN
C2+
C2–
GND
C3
10µF
CELLS
C1
0.22µF
C2
0.22µF
5V ±4%
@ 20mA
Figure 2. Two-Cell to 5V Application Circuit
10mF tantalum (SM)595D106X0010A2(603) 224-1430
(207) 324-7223
(603) 224-1961
(207) 327-4140
Sprague Electric
(smallest size)
0.1mF ceramic (TH)RPE121Z5U104M50V
(814) 238-0490(814) 237-1431Murata Erie1.0mF ceramic (TH)RPI123Z5U105M50V
0.22mF ceramic (SM)GRM42-6Z5U22M50
0.1mF ceramic (SM)GRM42-6Z5U10M50
CAPACITOR TYPE*CAPACITORFAX NUMBERPHONE NUMBERSUPPLIER

Partno	Mfg	Dc	Qty	Available	Descript
MAX619ESA+ \|MAX619ESA	MAXIM	N/a	195	avai	Regulated 5V Charge Pump DC-DC Converter
MAX619ESA+T \|MAX619ESAT	MAXI	N/a	29011	avai	Regulated 5V Charge Pump DC-DC Converter
MAX619ESA+T \|MAX619ESAT	MAXIM	N/a	2	avai	Regulated 5V Charge Pump DC-DC Converter
MAX619ESA-T \|MAX619ESAT	MAXIM	N/a	32182	avai	Regulated 5V Charge Pump DC-DC Converter
MAX619ESA-T \|MAX619ESAT	MAXI	N/a	2410	avai	Regulated 5V Charge Pump DC-DC Converter
MAX619CSA+ \|MAX619CSA	MAXIM	N/a	54	avai	Regulated 5V Charge Pump DC-DC Converter
MAX619CSA+T \|MAX619CSAT	MAX	N/a	484	avai	Regulated 5V Charge Pump DC-DC Converter