TPS768XXQ_08 Datasheet, PDF (1/23 Pages) Texas Instruments – FAST TRANSIENT RESPONSE, 1-A LOW-DROPOUT VOLTAGE REGULATORS

TPS768xxQ
www.ti.com
SLVS211L – JUNE 1999 – REVISED JANUARY 2006
FAST TRANSIENT RESPONSE, 1-A LOW-DROPOUT VOLTAGE REGULATORS
FEATURES
• Input Voltage Range: 2.7 V to 10 V
• Low-Dropout Voltage: 230 mV typical at 1 A
(TPS76850)
• 2% Tolerance Over Specified Conditions for
Fixed-Output Versions
• Open Drain Power Good (See TPS767xx for
Power-On Reset With 200-ms Delay Option)
• Ultralow 85 µA Typical Quiescent Current
• Available in 1.5-V, 1.8-V, 2.5-V, 2.7-V, 2.8-V,
3.0-V, 3.3-V, 5.0-V Fixed Output and
Adjustable (1.2 V to 5.5 V) Versions
• Fast Transient Response
• Thermal Shutdown Protection
• SOIC-8 (D) and TSSOP-20 (PWP) Package
D PACKAGE
(Top View)
GND 1
EN 2
IN 3
IN 4
8 PG
7 FB/NC
6 OUT
5 OUT
PWP PACKAGE
(Top View)
GND/HSINK 1
GND/HSINK 2
GND 3
NC 4
EN 5
IN 6
IN 7
NC 8
GND/HSINK 9
GND/HSINK 10
20 GND/HSINK
19 GND/HSINK
18 NC
17 NC
16 PG
15 FB/NC
14 OUT
13 OUT
12 GND/HSINK
11 GND/HSINK
DESCRIPTION
This device is designed to have a fast transient
response and be stable with 10 µF capacitors. This
combination provides high performance at a
reasonable cost.
Since the PMOS device behaves as a low-value
resistor, the dropout voltage is very low (typically
230 mV at an output current of 1 A for the TPS76850)
and is directly proportional to the output current.
Additionally, because the PMOS pass element is a
voltage-driven device, the quiescent current is very
low and independent of output loading (typically
85 µA over the full range of output current, 0 mA to
1 A). These two key specifications yield a significant
improvement in operating life for battery-powered
systems. This LDO family also features a shutdown
mode; applying a TTL high signal to EN (enable)
shuts down the regulator, reducing the quiescent
current to less than 1 µA at T_J = 25°C.
Power good (PG) is an active high output, which can
be used to implement a power-on reset or a
low-battery indicator.
V_I
0.1 µF
TPS768xx
6
IN
7
IN
5
EN
16
PG
14
OUT
13
OUT
GND
3
PG
V_O
C_o
+
10 µF
Figure 1. Typical Application Configuration
(For Fixed Output Options)
NC = No Internal Connection
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
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necessarily include testing of all parameters.
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