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
FEATURES
DESCRIPTION
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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.
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Dual Output Voltages for Split-Supply
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
Open Drain Power-On Reset with 120-ms Delay
Open Drain Power Good for Regulator 1 and
Regulator 2
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
2% Accuracy Over Load and Temperature
Undervoltage Lockout (UVLO) Feature
24-Pin PowerPAD™ TSSOP Package
Thermal Shutdown Protection
PWP PACKAGE
(TOP VIEW)
GND/HEATSINK
GND/HEATSINK
1
24
VIN1
2
23
VOUT1
VIN1
3
22
VOUT1
NC
4
21
VSENSE1/FB1
MR
5
20
NC
EN1
6
19
PG1
EN2
7
18
PG2
RESET
8
17
NC
GND
9
16
VSENSE2/FB2
VIN2
10
15
VOUT2
VIN2
11
14
VOUT2
GND/HEATSINK
12
13
GND/HEATSINK
NC = No internal connection
TPS70451 PWP
5V
VIN1
0.22 mF
22 mF
VSENSE1
250 kW
PG1
PG1
VIN2
0.22 mF
>2 V
EN1
2 V
MR
MR
250 kW
>2 V
