LX2173CM

LX2173CM Datasheet

LX2172/73

Part	Datasheet
LX2173CM	LX2173CM (pdf)

Related Parts	Information
LX2173CDM	LX2173CDM
LX2173CP	LX2173CP

PDF Datasheet Preview
L I N D O C # 2172 LX2172/73 1.25A HIGH-EFFICIENCY 100KHZ SWITCHING REGULATOR PR E L I M I N A RY DATASHEET The LX2172/73 are fixed-frequency, current-mode switching regulator integrated circuits. These ICs contain all necessary control circuitry plus a 1.25A on-board transistor to design a complete DC:DC switching regulator with minimum external components. All functions are integrated into a single IC, available in 8-pin DIP and SOIC or a 5-pin TO-220 power package, making them extremely easy to design with and use. The LX2172/73 are optimized for boost and flyback applications, but can also be used in forward and inverting converter configuations. The LX2172 can be connected to an external clock for synchronization, and can enter micropower operation when the VC pin is pulled low. The LX2173 has an enable function, which permits extremely low micropower operation, consuming under 10µA current when the ENABLE pin is brought low. NOTE For current data & package dimensions, visit our web site: PRODUCT HIGHLIGHT SEPIC CONVERTER USING THE LX2172 Input 6-24V, Output 7V, 300mA VIN 6-24VDC C1 22µF 0.1µF R1 13.7k C4 0.47µF 1 GND 2 VC 3 FB 4 SYNC LX2172 L1 1mH E2 8 VSW 7 E1 6 VIN 5 330µF D1 1N5817 COUT 220µF L2 1mH R2 3.0k See Note 1 R3 100 CDECOUPLE 0.47µF Output 7V 300mA Note 1 SYNC Pin Requirements: A F = 200kHz MAX B TTL Compatible Level C Pulse Width TP Range - 0.1µs < TP < 2.0µs KEY FEATURES s 1.25A, 65V Internal Power Switch s 3V - 25V Input Voltage Range s Current-Mode Operation s Improved Internal Cycle-By-Cycle Current Limiting s Thermal Shutdown s Less Than 10µA Quiescent Current In Microprocessor Shutdown Mode s External Frequency Synchronization Possible s 100kHz Operating Frequency A P L I C AT I O N S s Boost Converter s Laptop / Notebook Computers s Portable Equipment s Small Motor Applications s Flyback Converters

PDF Datasheet Preview

L I N D O C # 2172

LX2172/73
1.25A HIGH-EFFICIENCY 100KHZ SWITCHING REGULATOR PR E L I M I N A RY DATASHEET

The LX2172/73 are fixed-frequency, current-mode switching regulator integrated circuits. These ICs contain all necessary control circuitry plus a 1.25A on-board transistor to design a complete DC:DC switching regulator with minimum external components.

All functions are integrated into a single IC, available in 8-pin DIP and SOIC or a 5-pin TO-220 power package, making them extremely easy to design with and use. The LX2172/73 are optimized for
boost and flyback applications, but can also be used in forward and inverting converter configuations.

The LX2172 can be connected to an external clock for synchronization, and can enter micropower operation when the VC pin is pulled low. The LX2173 has an enable function, which permits extremely low micropower operation, consuming under 10µA current when the ENABLE pin is brought low.

NOTE For current data & package dimensions, visit our web site:

PRODUCT HIGHLIGHT

SEPIC CONVERTER USING THE LX2172 Input 6-24V, Output 7V, 300mA

VIN 6-24VDC

C1 22µF
0.1µF

R1 13.7k

C4 0.47µF
1 GND 2 VC 3 FB 4 SYNC

LX2172

L1 1mH

E2 8 VSW 7

E1 6 VIN 5
330µF D1
1N5817

COUT 220µF

L2 1mH

R2 3.0k

See Note 1

R3 100

CDECOUPLE 0.47µF

Output 7V
300mA

Note 1 SYNC Pin Requirements:

A F = 200kHz MAX

B TTL Compatible Level

C Pulse Width TP Range - 0.1µs < TP < 2.0µs

KEY FEATURES
s 1.25A, 65V Internal Power Switch s 3V - 25V Input Voltage Range s Current-Mode Operation s Improved Internal Cycle-By-Cycle Current

Limiting s Thermal Shutdown s Less Than 10µA Quiescent Current In

Microprocessor Shutdown Mode s External Frequency Synchronization

Possible s 100kHz Operating Frequency

A P L I C AT I O N S
s Boost Converter s Laptop / Notebook Computers s Portable Equipment s Small Motor Applications s Flyback Converters

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived LX2173CM Datasheet file may be downloaded here without warranties.

Datasheet ID: LX2173CM 648156