TPS5102
DUAL, HIGH-EFFICIENCY CONTROLLER FOR NOTEBOOK PC POWER
SLVS239 - SEPTEMBER 1999
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Dual, Step-Down for Notebook System
Power
4.5 V to 25 V Input Voltage Range
Adjustable Output Voltage
95% Efficiency Achievable
PWM/Skip Mode Control Maintains High
Efficiency Under Light Load Conditions
Fixed-Frequency Operation
Resistorless Current Protection
Fixed High-Side Driver Voltage
Low Quiescent Current (0.6 mA, <1
碌A(chǔ)
for
Standby)
Small 30-Pin TSSOP
EVM Available (TPS5102EVM-135)
DBT PACKAGE
(TOP VIEW)
description
INV1
FB1
SOFTSTART1
PWM_SKIP
C
T
R
T
GND
REF
STBY1
STBY2
V
CC
COMP
SOFTSTART2
FB2
INV2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
LH1
OUT1_u
LL1
OUT1_d
OUTGND1
TRIP1
VCC_CNTP
TRIP2
VREF5
REG5V_IN
OUTGND2
OUT2_d
LL2
OUT2_u
LH2
The TPS5102 is a dual, high efficiency controller designed for notebook system power requirements. Under light
load conditions, high efficiency is maintained as the controller switches from the PWM mode to the lower
frequency Skip mode.
These two operating modes, along with the synchronous-rectifier drivers, dead-time, and very low quiescent
current, allow power to be conserved and the battery life extended, under all load conditions.
The resistor-less current protection and fixed high-side driver voltage simplify the system design and reduce
the external parts count. The wide input voltage range and adjustable output voltages allow flexibility for using
the TPS5102 in notebook power supply applications.
5V
+
C1
GND
C3
R5
C7
R3
R7
U1
TPS5102DBT
C10
C4
C8
R2
C2
D1
R8
Q2
+
C12
R9
R10
Q1
L1
Vo1
C5
C11
C6
C9
R6
D2
R11
Q4
Q3
L2
C13
+
Vo2
R4
R1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright
漏
1999, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
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