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Part: MAX619
Category:
Power Management
-> DC-DC Converters
Description: Regulated 5V Charge Pump DC-DC Converter
Company: Maxim Integrated Products
Datasheet: Download MAX619 datasheet File size : 443 kB
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Datasheet text preview:
19-0227; Rev 2; 5/96
NUAL KIT MA ATION ET EVALU TA SHE WS DA FOLLO
Regulated 5V Charge-Pump DC-DC Converter
____________________________Features
o Regulated 5V ±4% Charge Pump o Output Current Guaranteed over Temperature 20mA (VIN 2V) 50mA (VIN 3V) o 2V to 3.6V Input Range o No Inductors; Very Low EMI Noise o Ultra-Small Application Circuit (0.1in2) o Uses Small, Inexpensive Capacitors o 500kHz Internal Oscillator o Logic-Controlled 1µA Max Shutdown Supply Current o Shutdown Disconnects Load from Input o 8-Pin DIP and SO Packages
_______________General Description
The MAX619 step-up charge-pump DC-DC converter delivers a regulated 5V ±4% output at 50mA over temperature. The input voltage range is 2V to 3.6V (two battery cells). The complete MAX619 circuit fits into less than 0.1in2 of b o a r d space because it requires only four external c a p a c i t o r s : two 0.22µF flying capacitors, and 10µF capacitors at the input and output. Low operating supply current (150µA max) and low shutdown supply current (1µA max) make this device ideal for small, portable, and battery-powered applications. When shut down, the load is disconnected from the input. The MAX619 is available in 8-pin DIP and SO packages.
MAX619
________________________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
_______________Ordering Information
PART MAX619CPA MAX619CSA MAX619C/D MAX619EPA MAX619ESA MAX619MJA TEMP. RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C PIN-PACKAGE 8 Plastic DIP 8 SO Dice* 8 Plastic DIP 8 SO 8 CERDIP
* Dice are specified at TA = +25 °C.
__________________Pin Configuration
TOP VIEW
__________Typical Operating Circuit
2 INPUT V to 3.6V 10µF 1+ 1 IN 2 OUT 3 C C2+ 4 M 8 C17 SHDN ON/OFF
IS N
OUT C 10µF
5 UTPUT O V, 20mA
MAX619
HDN C1+ 0.22µF C1GND C22+ 0.22µF
AX619
6 GND 5 C2-
DIP/SO
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
Regulated 5V Charge-Pump DC-DC Converter MAX619
ABSOLUTE MAXIMUM RATINGS
VIN to GND ...-0.3V to +5.5V VOUT to GND .........-0.3V to +5.5V SHDN to GND ....-0.3V to (VIN + 0.3V) IOUT Continuous (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 Note 1: The MAX619 is not short-circuit protected.
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.
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
ELECTRICAL CHARACTERISTICS
(VIN = 2V to 3.6V, C1 = C2 = 0.22µF, C3 = C4 = 10µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Input Voltage SYMBOL VIN 2.0V VIN 3.6V, 0mA IOUT 20mA Output Voltage VOUT 3.0V VIN 3.6V, 0mA IOUT 50mA, MAX619C 3.0V VIN 3.6V, 0mA IOUT 45mA, MAX619E 3.0V VIN 3.6V, 0mA IOUT 40mA, MAX619M Output Ripple No-Load Supply Current Shutdown Supply Current Efficiency Switching Frequency SHDN Input Threshold SHDN Input Current VIH VIL IIH VSHDN = VIN MAX619C/E MAX619M Eff VRIPPLE IIN No load to full load
2V VIN 3.6V, IOUT = 0mA 2V VIN 3.6V, IOUT = 0mA, VSHDN = VIN MAX619C/E MAX619M
CONDITIONS
MIN 2
TYP
MAX 3.6
UNITS V
4.8
5.0
5.2
V
100 75 0.02 82 82 80 500 0.7 x VIN 0.4 ±1 ±10 170 1 10
mV µA µA
VIN = 3V, IOUT = 20mA VIN = 3V, IOUT = 30mA VIN = 2V, IOUT = 20mA At full load
% kHz V µA
2
________________________________________________________________________________________
Regulated 5V Charge-Pump DC-DC Converter
__________________________________________Typical Operating Characteristics
(TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. OUTPUT CURRENT A ND INPUT VOLTAGE
90 8 65 VIN = 1.8V VIN = 3.0V 200 80 160 140
MAX619
INPUT CURRENT vs. OUTPUT CURRENT D E C IIN (µA) B
VIN IOUT M
AX
NO-v OAD INPUT CURRENT L s. INPUT VOLTAGE
1000
G F
SHDN = 0V
100
EFFICIENCY (%)
80
IIN (mA)
VIN = 2.0V 75 VIN = 3.3V 70 5 VIN = 2.7V 60 1 10 IOUT (mA) 100 VIN = 3.6V VIN = 2.4V
120 100 80 60 0 40 20
10
A
A B C D E F G
1.8 2.0 2.4 2.7 3.0 3.6 3.3
18 36 41 64 72 94 100
1.0
0.1 0.01 1.5 2.0
SHDN = VIN
2.5 3.0 3.5 4.0 4.5
0 10 20 30 40 50 60 70 80 90 100
IOUT (mA) UTPUT VOLTAGE vs. INPUT VOLTAGE
5.06 90
VIN (V) FFICIENCY vs. INPUT VOLTAGE IOUT = 10mA
OUTPUT VOLTAGE vs. OUTPUT CURRENT
5.05 VIN = 3.3V 5.00 4.95 4.90 4.85 4.80 4.75 1 10 100 VIN = 1.8V VIN = 2.0V VIN = 2.4V, 2.7V VIN = 3.0V
=N= VI3.6V 3.6V
5.04 5.02
85
EFFICIENCY (%)
IOUT = 20mA VOUT (V)
80 75 70 65 60 1.5 E 2.0 2.5 3.0 3.5 4.0
VOUT (V)
5.00 4.98 4.96 4.94 O 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
IOUT (mA)
VIN (V)
VIN (V)
LOAD-TRANSIENT RESPONSE
LINE-TRANSIENT RESPONSE (IOUT = 20mA)
2ms/div TOP TRACE: OUTPUT CURRENT, 0mA to 25mA, 10mA/div BOTTOM TRACE: OUTPUT VOLTAGE, 5mV/div, AC-COUPLED
2ms/div RLOAD = 250, VOUT = 5V, IOUT = 20mA TOP TRACE: VIN = 2V to 3V, 1V/div BOTTOM TRACE: OUTPUT VOLTAGE, 50mV/div, AC-COUPLED
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