TPS70345 Datasheet, PDF (1/35 Pages) Texas Instruments – DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS

TPS70345, TPS70348, TPS70351, TPS70358, TPS70302
DUAL-OUTPUT LOW-DROPOUT VOLTAGE REGULATORS
WITH POWER UP SEQUENCING FOR SPLIT VOLTAGE DSP SYSTEMS
SLVS285A – AUGUST 2000 – REVISED OCTOBER 2002
D Dual Output Voltages for Split-Supply
Applications
D Selectable Power Up Sequencing for DSP
Applications (See TPS704xx for
Independent Enabling of Each Output)
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
Delay
description
D Open Drain Power Good for Regulator 1
D Ultralow 185 µA (typ) Quiescent Current
D 2 µA Input Current During Standby
D Low Noise: 78 µV_RMS Without Bypass
Capacitor
D Quick Output Capacitor Discharge Feature
D Two Manual Reset Inputs
D 2% Accuracy Over Load and Temperature
D Undervoltage Lockout (UVLO) Feature
D 24-Pin PowerPAD TSSOP Package
D Thermal Shutdown Protection
PWP PACKAGE
(TOP VIEW)
TPS703xx family of devices are designed to ^GND/HEATSINK
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provide a complete power management solution
for TI DSP, processor power, ASIC, FPGA, and
digital applications where dual output voltage
regulators are required. Easy programmability of
the sequencing function makes this family ideal
for any TI DSP applications with power
sequencing requirement. Differentiated features,
V_IN1
2
V_IN1
3
NC
4
MR2
5
MR1
6
EN
7
SEQ
8
GND
9
such as accuracy, fast transient response, SVS
supervisory circuit (power on reset), manual reset
inputs, and enable function, provide a complete
V_IN2
V_IN2
GND/HEATSINK
10
11
12
system solution.
NC – No internal connection
24
GND/HEATSINK
23
V_OUT1
22
V_OUT1
21
V_SENSE1/FB1
20
NC
19
PG1
18
RESET
17
NC
16
V_SENSE2/FB2
15
V_OUT2
14
V_OUT2
13
GND/HEATSINK
TPS70351 PWP
5V
VIN1
VOUT1
DSP
3.3 V
I/O
0.22 µF
VIN2
0.22 µF
VSENSE1
PG1
MR2
RESET
22 µF
250 kΩ
PG1
MR2 _{>2 V}
<0.7 V
250 kΩ
RESET
>2 V ^EN
<0.7 V
EN
SEQ
MR1
VSENSE2
VOUT2
MR1
>2 V
<0.7 V
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  2002, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
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