TPS70451 Datasheet, PDF (1/32 Pages) Texas Instruments – DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS WITH INTEGRATED SVS FOR SPLIT VOLTAGE SYSTEMS

TPS70445, TPS70448, TPS70451, TPS70458, TPS70402
DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS
WITH INTEGRATED SVS FOR SPLIT VOLTAGE SYSTEMS
SLVS307B – SEPTEMBER 2000 – REVISED APRIL 2003
D Dual Output Voltages for Split-Supply
D Ultralow 185 µA (typ) Quiescent Current
Applications
D Independent Enable Functions (See Part
Number TPS703xx for Sequenced Outputs)
D Output Current Range of 1 A on
Regulator 1 and 2 A on Regulator 2
D Fast Transient Response
D Voltage Options Are 3.3-V/2.5-V, 3.3-V/1.8-V,
3.3-V/1.5-V, 3.3-V/1.2-V, and Dual Adjustable
Outputs
D Open Drain Power-On Reset With 120-ms
D 2 µA Input Current During Standby
D Low Noise: 78 µV_RMS Without Bypass
Capacitor
D Quick Output Capacitor Discharge Feature
D One Manual Reset Input
D 2% Accuracy Over Load and Temperature
D Undervoltage Lockout (UVLO) Feature
D 24-Pin PowerPAD TSSOP Package
D Thermal Shutdown Protection
Delay
D Open Drain Power Good for Regulator 1
GND/HEATSINK
1
and Regulator 2
V_IN1
2
description
V_IN1
3
NC
4
The TPS704xx family of devices consists of
MR
5
dual-output low-dropout voltage regulators with
EN1
6
integrated SVS (RESET, POR, or power on reset)
EN2
7
and power good (PG) functions. These devices
are capable of supplying 1 A and 2 A by regulator
1 and regulator 2 respectively. Quiescent current
is typically 185 µA at full load. Differentiated
RESET
GND
V_IN2
V_IN2
GND/HEATSINK
8
9
10
11
12
features, such as accuracy, fast transient
response, SVS supervisory circuit (power on ^{NC – No internal connection}
24
GND/HEATSINK
23
V_OUT1
22
V_OUT1
21
V_SENSE1/FB1
20
NC
19
PG1
18
PG2
17
NC
16
V_SENSE2/FB2
15
V_OUT2
14
V_OUT2
13
GND/HEATSINK
reset), manual reset input, and independent
enable functions provide a complete system
solution.
TPS70451 PWP
5V
VIN1
VOUT1
3.3 V
I/O
0.22 µF
VIN2
0.22 µF
VSENSE1
PG1
MR
RESET
22 µF
250 kΩ
PG1
MR _{>2 V}
<0.7 V
250 kΩ
250 kΩ
RESET
>2 V
<0.7 V
>2 V
<0.7 V
EN1
EN1
EN2 _EN2
PG2
VSENSE2
VOUT2
PG2
47 µF
1.8 V
Core
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.
PowerPAD is a trademark of Texas Instruments.
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  2000, – 2003 Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
1