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L4992

Features: `DUAL PWM BUCK CONTROLLERS (3.3V and 5.1V)`12V/120mA LINEAR REGULATOR`DUAL SYNCH RECTIFIERS DRIVERS`96% EFFICIENCY ACHIEVABLE`50A (@ 12V) STAND BY CONSUMPTION`5.5V TO 25V SUPPLY VOLTAGE`EXCELLENT LOAD TRANSIENT RESPONSE`DISABLE PULSE SKIPPING FUNCTION`POWER MANAGEMENT: - UNDER AND OVERVO...

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SeekIC No. : 004389183 Detail

L4992: Features: `DUAL PWM BUCK CONTROLLERS (3.3V and 5.1V)`12V/120mA LINEAR REGULATOR`DUAL SYNCH RECTIFIERS DRIVERS`96% EFFICIENCY ACHIEVABLE`50A (@ 12V) STAND BY CONSUMPTION`5.5V TO 25V SUPPLY VOLTAGE`EX...

L4992 Data Sheet

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Part Number:
L4992
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/5/18

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Product Details

Description



Features:

`DUAL PWM BUCK CONTROLLERS (3.3V and 5.1V)
`12V/120mA LINEAR REGULATOR
`DUAL SYNCH RECTIFIERS DRIVERS
`96% EFFICIENCY ACHIEVABLE
`50A (@ 12V) STAND BY CONSUMPTION
`5.5V TO 25V SUPPLY VOLTAGE
`EXCELLENT LOAD TRANSIENT RESPONSE
`DISABLE PULSE SKIPPING FUNCTION
`POWER MANAGEMENT:
   - UNDER AND OVERVOLTAGE OUTPUT DETECTION
   - POWER GOOD SIGNAL
   - SEPARATED DISABLE
`THERMAL SHUTDOWN
`PACKAGE: TQFP32


Application

·NOTEBOOK AND SUBNOTEBOOK COMPUTERS
·PEN TOP AND PORTABLE EQUIPMENT
·COMMUNICATING COMPUTERS


Pinout

Connection Diagram


Specifications

Symbol Parameter
Value
Unit
VIN Power Supply Voltage on VIN
0 to 25
V
VI Maximum Pin Voltage to Pins 1, 24, 25, 32
-0.5 to (VIN +5)
V
IIN Input Current Except V13IN and VIN
-1 to +1
mA
IOUT Output Current Digital Output
-15 to +15
mA
TJ junction temperature
-55 to +150



Description

The L4992 is a sophisticated dual PWM stepdown controller and power monitor intended for Notebook computer and/or battery powered equipment. L4992 produces regulated +3.3V, +5.1V and 12V supplies for use in portable and PCMCIA applications.

The internal architecture allows to operate with minimum external components count. A very high switching frequency (200/300 KHz or externally synchronizable) optimizes their physical dimensions.

Synchronous rectification and pulse skipping mode for the buck sections optimise the overall efficiency over a wide load current range (96% efficiency @1A/5.1V and 93% efficiency @ 0.05A/5.1V.

The two high performance PWM controllers for +3.3V and +5.1V lines are monitored for overvoltage, undervoltage and overcurrent conditions. On detection of a fault, a POWER GOOD signal is generated and a specific shutdown procedure takes place to prevent physical damage and data corruption.

A disable function allows to manage the output power sections separately, optimising the quiescent consumption of the IC in stand-by conditions.




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