TPS70445PWPR Datasheet, PDF (1/40 Pages) Texas Instruments – DUAL-OUTPUT, LOW DROPOUT VOLTAGE REGULATORS WITH INTEGRATED SVS FOR SPLIT VOLTAGE SYSTEMS

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TPS70445, TPS70448
TPS70451, TPS70458
TPS70402
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
1
•23 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: 78mV_RMS 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
DESCRIPTION
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.
PWP PACKAGE
(TOP VIEW)
GND/HEATSINK
1
V_IN1
2
V_IN1
3
NC
4
MR
5
EN1
6
EN2
7
RESET
8
GND
9
V_IN2
10
V_IN2
11
GND/HEATSINK
12
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
NC = No internal connection
TPS70451 PWP
5V
VIN1
VOUT1
3.3 V
I/O
0.22 mF
VIN2
0.22 mF
VSENSE1
PG1
MR
RESET
22 mF
250 kW
PG1
MR _{>2 V}
<0.7 V
250 kW
250 kW
RESET
>2 V
<0.7 V
>2 V
<0.7 V
EN1 _EN1
EN2 _EN2
PG2
VSENSE2
VOUT2
PG2
47 mF
1.8 V
Core
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.
PowerPAD is a trademark of Texas Instruments.
2
All other trademarks are the property of their respective owners.
3
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