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参数资料
| 型号： | L5994A |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A DUAL SWITCHING CONTROLLER, 345 kHz SWITCHING FREQ-MAX, PQFP32 |
| 封装： | TQFP-32 |
| 文件页数： | 1/26页 |
| 文件大小： | 322K |
| 代理商： | L5994A |
1/26
L5994
L5994A
April 2002
FEATURE
s
DUAL PWM CONTROLLERS ADJUSTABLE
1.9V to 5.3V(Section1)
1.6V to 3.5V(Section2)
s
AUXILIARY DRIVER FOR LINEAR
REGULATOR
s
CURRENT MODE CONTROL USING A LOW
SENSE RESISTOR
s
DUAL SYNC RECTIFIERS DRIVERS
s
"ONE SHOT" FEATURE (L5994A only)
s
96% EFFICIENCY ACHIEVABLE
s
50
A@12V STAND BY CONSUMPTION
s
4.75V TO 25V OPERATING SUPPLY VOLTAGE
s
EXCELLENT LOAD TRANSIENT RESPONSE
s
"PULSE SKIPPING" FUNCTION
s
OUTPUT UNDER VOLTAGE SHUTDOWN
s
ADAPTATIVE ANTI SHOOT-THROUGH
CONTROL
s
OVER/UNDER VOLTAGE DETECTION
s
POWER GOOD SIGNALS
s
SEPARATED DISABLE
s
THERMAL SHUTDOWN
APPLICATIONS
s
NOTEBOOK AND SUB NOTEBOOK
COMPUTERS
s
1.8V AND 2.5V I/O SUPPLY
s
WORDPAD
s
INTERNET APPLIANCE
DESCRIPTION
The device provides a dual PWM controller and a
linear driver controller that can support the complete
power management in mobile equipment with high
efficiency.
TQFP32
ORDERING NUMBERS: L5994
L5994A
ADJUSTABLE TRIPLE OUTPUT
POWER SUPPLY CONTROLLER
Figure 1. System Block Diagram
SYNC
POWER
MANAGEMENT
& SYSTEM
SUPERVISOR
5V
to
25V
2.5V
1.8V
POWER
SECTION
L5994
P
MEMORY
PERIPHERALS
12V LDO
5.1V LDO
3.39V REF
D98IN862
POWER GOOD
Obsolete
Product(s)
- Obsolete
Product(s)
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