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ADP1173AN-33 반도체 회로 부품 판매점

Micropower DC-DC Converter



Analog Devices 로고
Analog Devices
ADP1173AN-33 데이터시트, 핀배열, 회로
a
FEATURES
Operates From 2.0 V to 30 V Input Voltages
Only 110 A Supply Current (Typical)
Step-Up or Step-Down Mode Operation
Very Few External Components Required
Low Battery Detector On-Chip
User-Adjustable Current Limit
Internal 1 A Power Switch
Fixed or Adjustable Output Voltage Versions
8-Pin DIP or SO-8 Package
APPLICATIONS
Notebook and Palmtop Computers
Cellular Telephones
Flash Memory Vpp Generators
3 V to 5 V, 5 V to 12 V Converters
9 V to 5 V, 12 V to 5 V Converters
Portable Instruments
LCD Bias Generators
GENERAL DESCRIPTION
The ADP1173 is part of a family of step-up/step-down switching
regulators that operates from an input supply voltage of as little as
2 V to 12 V in step-up mode and to 30 V in step-down mode.
The ADP1173 consumes as little as 110 µA in standby mode,
making it ideal for applications that need low quiescent current.
An auxiliary gain amplifier can serve as a low battery detector,
linear regulator (under voltage lockout) or error amplifier.
The ADP1173 can deliver 80 mA at 5 V from a 3 V input in
step-up configuration or 100 mA at 5 V from a 12 V input in
step-down configuration. For input voltages of less than 2 V use
the ADP1073.
Micropower
DC-DC Converter
ADP1173
FUNCTIONAL BLOCK DIAGRAMS
SET
VIN
1.245V
REFERENCE
A2
GAIN BLOCK/
ERROR AMP
ADP1173
A1 OSCILLATOR
COMPARATOR
DRIVER
AO
ILIM
SW1
GND
FB
SW2
SET
VIN
1.245V
REFERENCE
ADP1173-3.3
ADP1173-5
ADP1173-12
A2
GAIN BLOCK/
ERROR AMP
A1 OSCILLATOR
AO
ILIM
SW1
R1
GND
COMPARATOR
DRIVER
R2
753k
ADP1173-3.3: R1 = 456k
ADP1173-5: R1 = 250k
ADP1173-12: R1 = 87.4k
SENSE
SW2
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700 World Wide Web Site: http://www.analog.com
Fax: 617/326-8703
© Analog Devices, Inc., 1997


ADP1173AN-33 데이터시트, 핀배열, 회로
ADP1173–SPECIFICATIONS (@ TA = 0؇C to +70؇C, VIN = 3 V unless otherwise noted)
Model
Symbol
QUIESCENT CURRENT
IQ
QUIESCENT CURRENT, BOOST MODE IQ
CONFIGURATION
Conditions
Switch Off
No Load, TA = +25°C
ADP1173-3.3
ADP1173-5
ADP1173-12
Min Typ
110
135
135
250
Max
150
Units
µA
µA
µA
µA
INPUT VOLTAGE
VIN Step-Up Mode
Step-Down Mode
2.0
12.6 V
30 V
COMPARATOR TRIP POINT VOLTAGE
ADP11731
1.20 1.245 1.30 V
OUTPUT SENSE VOLTAGE
VOUT
ADP1173-3.32
ADP1173-52
ADP1173-122
3.14 3.30
4.75 5.00
11.4 12.0
3.46 V
5.25 V
12.6 V
COMPARATOR HYSTERESIS
ADP1173
5 12 mV
OUTPUT HYSTERESIS
ADP1173-3.3
ADP1173-5
ADP1173-12
13 35 mV
20 55 mV
50 100 mV
OSCILLATOR FREQUENCY
DUTY CYCLE
fOSC
Full Load
16 24
43 55
32 kHz
63 %
SWITCH ON TIME
FEEDBACK PIN BIAS CURRENT
SET PIN BIAS CURRENT
GAIN BLOCK OUTPUT LOW
REFERENCE LINE REGULATION
SWSAT VOLTAGE, STEP-UP MODE
tON
VOL
VSAT
SWSAT VOLTAGE, STEP-DOWN MODE VSAT
GAIN BLOCK GAIN
CURRENT LIMIT
CURRENT LIMIT TEMPERATURE
COEFFICIENT
AV
ILIM Tied to VIN
ADP1173, VFB = 0 V
VSET = VREF
ISINK = 100 µA, VSET = 1.00 V
2.0 V VIN 5 V
5 V VIN 30 V
VIN = 3.0 V, ISW = 650 mA
VIN = 5.0 V, ISW = 1 A,
TA = +25°C
VIN = 5.0 V, ISW = 1 A
VIN = 12 V, TA = +25°C,
ISW = 650 mA
VIN = 12 V, ISW = 650 mA
RL = 100 k3
220 from ILIM to VIN
TA = +25°C
15
400
23
60
70
0.15
0.2
0.02
0.5
0.8
1.1
1000
400
–0.3
32
290
150
0.4
0.4
0.075
0.85
µs
nA
nA
V
%/V
%/V
V
1.0 V
1.4 V
1.5 V
1.7 V
V/V
mA
%/°C
SWITCH-OFF LEAKAGE CURRENT
Measured at SW1 Pin
TA = +25°C
1 10 µA
MAXIMUM EXCURSION BELOW GND VSW2
ISW1 10 µA, Switch Off
TA = +25°C
–400
–350 mV
NOTES
1This specification guarantees that both the high and low trip points of the comparator fall within the 1.20 V to 1.30 V range.
2The output voltage waveform will exhibit a sawtooth shape due to the comparator hysteresis. The output voltage on the fixed output versions will always be within
the specified range.
3100 kresistor connected between a 5 V source and the AO pin.
Specifications subject to change without notice.
–2– REV. 0




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ADP1173AN-33 converter

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Micropower DC-DC Converter - Analog Devices