TPS5102
DUAL, HIGH-EFFICIENCY CONTROLLER FOR NOTEBOOK PC POWER
SLVS239 - SEPTEMBER 1999
DBT PACKAGE
(TOP VIEW)
Dual, Step-Down for Notebook System
Power
4.5 V to 25 V Input Voltage Range
Adjustable Output Voltage
95% Efficiency Achievable
INV1
FB1
LH1
1
30
29
28
27
26
25
24
23
22
21
20
OUT1_u
LL1
2
SOFTSTART1
PWM_SKIP
3
OUT1_d
OUTGND1
TRIP1
4
PWM/Skip Mode Control Maintains High
Efficiency Under Light Load Conditions
C
5
T
R
T
GND
REF
6
Fixed-Frequency Operation
Resistorless Current Protection
Fixed High-Side Driver Voltage
VCC_CNTP
TRIP2
7
8
STBY1
STBY2
VREF5
9
Low Quiescent Current (0.6 mA, <1 µA for
Standby)
REG5V_IN
OUTGND2
10
11
V
CC
COMP 12
SOFTSTART2 13
FB2 14
19 OUT2_d
18 LL2
Small 30-Pin TSSOP
EVM Available (TPS5102EVM-135)
17 OUT2_u
15
16
INV2
LH2
description
TheTPS5102isadual, highefficiencycontrollerdesignedfornotebooksystempowerrequirements. Underlight
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.
5 V
R3
+
C1
Q1
Q2
R7
GND
L1
R5
C7
C3
U1
R8
D1
Vo1
TPS5102DBT
+
C10
C12
C4
C8
R2
R9
R10
C2
C5
C13
+
C11
Q3
Q4
C6
R4
Vo2
R11
D2
L2
C9
R1
R6
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.
Copyright 1999, Texas Instruments Incorporated
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.
1
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