Micropower DC-DC Converter ADP1173 FUNCTIONAL BLOCK DIAGRAM

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Micropower DC-DC Converter ADP1173 FUNCTIONAL BLOCK DIAGRAM

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FEATURES Operates From Input Voltages Typical Only Supply Current Step-Up Step-Down Mode Operation Very External Components Required Battery Detector Chip User-Adjustable Current Limit Internal Power Switch Fixed Adjustable Output Voltage Versions 8-Pin Plastic SO-8 Package APPLICATIONS Notebook Palmtop Computers Cellular Telephones Flash Memory Generators Converters Converters Portable Instruments Bias Generators GENERAL DESCRIPTION
Micropower DC-DC Converter ADP1173
FUNCTIONAL BLOCK DIAGRAM
ADP1173
ILIM 1.245 REFERENCE
GAIN BLOCK/ ERROR
OSCILLATOR DRIVER
COMPARATOR
ADP1173 part family step-up/step-down switching regulators that operates from input supply voltage little step-up mode step-down mode.
ADP1173 consumes little standby mode making ideal applications that need quiescent current. auxiliary gain amplifier serve battery detector linear regulator, under voltage lockout, error amplifier. ADP1173 deliver from input step-up configuration from input step-down configuration. input voltages less than ADP1073.
Model
ORDERING GUIDE Output Voltage Package Description*
ADP1173AN ADP1173AR ADP1173AN-5 ADP1173AR-5 ADP1173AN-12 ADP1173AR-12
PDIP SO-8 PDIP SO-8 PDIP SO-8
*For outline information Package Information section.
CONFIGURATIONS 8-Lead Plastic
ILIM (SENSE)* ILIM
8-Lead SOIC
(SENSE)*
ADP1173
ADP1173
VIEW (Not Scale)
VIEW (Not Scale)
*FIXED VERSIONS
*FIXED VERSIONS
This information applies product under development. characteristics specifications subject change without notice. Analog Devices assumes obligation regarding future manufacture unless otherwise agreed writing.
obtain most recent version complete data sheet, call retrieval system 1-800-446-6212 visit World Wide site http://www.analog.com.
REV.
ADP1173-SPECIFICATIONS
unless otherwise noted)
Units
Parameter
Symbol
Conditions
QUIESCENT CURRENT* QUIESCENT CURRENT, BOOST MODE CONFIGURATION INPUT VOLTAGE* COMPARATOR TRIP POINT VOLTAGE* OUTPUT SENSE VOLTAGE* COMPARATOR HYSTERESIS* OUTPUT HYSTERESIS* OSCILLATOR FREQUENCY* DUTY CYCLE* SWITCH TIME* FEEDBACK BIAS CURRENT* BIAS CURRENT* GAIN BLOCK OUTPUT LOW*
Switch Load ADP1173-5 Load ADP1173-12 Step-Up Mode Step-Down Mode ADP11731 1.20
12.6 1.245 1.30 5.00 5.25 12.0 12.6
VOUT
ADP1173-5 ADP1173-122 ADP1173 ADP1173-5 ADP1173-12
4.75 11.4
fOSC Full Load ILIM Tied ADP1173, VSET VREF
REFERENCE LINE REGULATION*
NOTES *Denotes specifications that apply over full operating temperature range. This specification guarantees that both high trip points comparator fall within 1.20 1.30 range. output voltage waveform will exhibit sawtooth shape comparator hysteresis. output voltage fixed output versions will always within specified range. Specifications subject change without notice.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VIN) Voltage (VSW1) Voltage (VSW2) -0.5 Feedback Voltage (ADP1173) Sense Voltage (ADP1173, -12) Maximum Power Dissipation Maximum Switch Current Operating Temperature Range -40°C +85°C Storage Temperature Range -65°C +150°C Lead Temperature, (Soldering, sec) +300°C
470µF NICAD ALKALINE CELLS
ISINK VSET 1.00
0.15 0.02 0.075
TYPICAL APPLICATION
100µH
IRF7203
OUTPUT AT100mA
ILIM 470µF 470µF 470k
ADP1173
COILTRONICS CTX100-4
This information applies product under development. characteristics specifications subject change without notice. Analog Devices assumes obligation regarding future manufacture unless otherwise agreed writing.
REV.

Micropower DC-DC Converter ADP1173 FUNCTIONAL BLOCK DIAGRAM

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