TPS70445, TPS70448
TPS70451, TPS70458
TPS70402
www.ti.com
SLVS307F –SEPTEMBER 2000–REVISED APRIL 2010
DUAL-OUTPUT, LOW DROPOUT VOLTAGE REGULATORS
WITH INTEGRATED SVS FOR SPLIT VOLTAGE SYSTEMS
Check for Samples: TPS70445, TPS70448, TPS70451, TPS70458, TPS70402
1
FEATURES
DESCRIPTION
23
•
Dual Output Voltages for Split-Supply
The TPS704xx family of devices consists of
dual-output, low-dropout voltage regulators with
integrated SVS (RESET, POR, or power on reset)
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 mA at full load. Differentiated features, such as
accuracy, fast transient response, SVS supervisory
circuit (power on reset), manual reset input, and
independent enable functions provide a complete
system solution.
Applications
•
Independent Enable Functions (See Part
Number TPS703xx for Sequenced Outputs)
•
Output Current Range of 1 A on Regulator 1
and 2 A on Regulator 2
•
•
Fast Transient Response
Voltage Options: 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
PWP PACKAGE
(TOP VIEW)
•
•
Open Drain Power-On Reset with 120-ms Delay
Open Drain Power Good for Regulator 1 and
Regulator 2
GND/HEATSINK
GND/HEATSINK
1
24
23
22
21
20
19
18
17
16
15
14
13
VIN1
2
VOUT1
VOUT1
VSENSE1/FB1
NC
•
•
•
•
•
•
•
•
•
Ultralow 185mA (typ) Quiescent Current
2mA Input Current During Standby
Low Noise: 78mVRMS Without Bypass Capacitor
Quick Output Capacitor Discharge Feature
One Manual Reset Input
VIN1
3
4
NC
MR
5
EN1
EN2
6
PG1
7
PG2
RESET
8
NC
2% Accuracy Over Load and Temperature
Undervoltage Lockout (UVLO) Feature
24-Pin PowerPAD™ TSSOP Package
Thermal Shutdown Protection
9
GND
VSENSE2/FB2
VOUT2
VIN2
10
11
12
VIN2
VOUT2
GND/HEATSINK
GND/HEATSINK
NC = No internal connection
TPS70451 PWP
V
I/O
3.3 V
OUT1
5 V
V
IN1
22 mF
0.22 mF
V
SENSE1
250 kW
250 kW
250 kW
PG1
PG1
MR
MR
>2 V
V
IN2
<0.7 V
0.22 mF
EN1
RESET
RESET
PG2
>2 V
>2 V
PG2
EN1
EN2
<0.7 V
<0.7 V
EN2
V
SENSE2
1.8 V
Core
V
OUT2
47 mF
1
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.
2
3
PowerPAD is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2000–2010, Texas Instruments Incorporated