參數(shù)資料
型號(hào)： L5994A
英文描述： ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER
中文描述： 可調(diào)三路輸出電源控制器
文件頁(yè)數(shù)： 2/26頁(yè)
文件大小： 301K
代理商： L5994A
L5994 - L5994A
2/26
DESCRIPTION
(continued)
The device produces an adjustable regulated voltage in both sections and a linear regulated voltage with an
external bipolar such as for PCMCIA applications.
The auxiliary linear driver is able to source up to 1A for 12V bus and is also possible to use it for the regulation
of 2.5V from 5V bus.
Synchronous rectification and pulse skipping mode for the buck sections optimise the overall efficiency over a
wide load current range.
The two high performance PWM output sections are monitored for over voltage, under voltage and over current
conditions.
A POWER GOOD signal is provided for each section.
On detection of a fault, the relevant 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 consump-
tion of the IC in stand-by conditions.
The internal architecture is a current mode that allows to have fast transient response without compromise the
efficiency due to the ultra low sense resistor.
Under voltage shutdown is forced in case of short circuit in one of the two sections.
The drivers are provided of an adaptative anti cross conduction system for high output current application
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
PIN CONNECTIONS
(Top views)
Symbol
Parameters
Value
Unit
V
in
Power Supply Voltage
0 to 27
V
V
i
Maximum pin voltage to pins 1,24,25,32
-0.3 to (V
in
+ 0.3)
V
Symbol
Parameters
Value
Unit
R
TH j-amb
Thermal Resistance Junction to Ambient
60
°C/W
T
j
Operative Junction Temperature Range
-40 to 140
°C
1
2
3
5
6
4
7
8
11 12 13 14 15 16
32
30
31
29 28 27 26 25
19
18
17
24
23
22
20
21
I1SNS
V1SNS
V5SW
VIN
H1STRAP
SREG5
COMP1
SOFT1
C
R
P
V
S
N
O
R
H
R
H
P
P
R
H
H
I2SNS
COMP2
SOFT2
H2STRAP
PWROK2
VFBLIN
V2SNS
VDRLIN
D98IN863B
9
10
相關(guān)PDF資料
PDF描述
L5994 ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER
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