Document
TPS7430: Not Recommended For New Designs
TPS7415, TPS7418, TPS7425, TPS7430, TPS7433 FAST-TRANSIENT-RESPONSE USING SMALL OUTPUT CAPACITOR
200-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS212 – DECEMBER 1999
D Fast Transient Response Using Small
Output Capacitor (10 µF)
D 200-mA Low-Dropout Voltage Regulator D Available in 1.5-V, 1.8-V, 2.5-V, 3-V and 3.3-V D Dropout Voltage Down to 170 mV at 200 mA
(TPS7433)
D 3% Tolerance Over Specified Conditions D 8-Pin SOIC Package D Thermal Shutdown Protection
D PACKAGE (TOP VIEW)
EN 1 NC 2 NC 3 IN 4
8 SENSE 7 OUT 6 GND 5 IN
NC – No internal connection
description
This device is designed to have a fast transient response and be stable with 1-µF capacitors. This combination provides high performance at a reasonable cost.
Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 170 mV at an output current of 200-mA for the TPS7433). This LDO family also features a sleep mode; applying a TTL high signal to EN (enable) shuts down the regulator, reducing the quiescent current to less than 1 µA at TJ = 25°C.
The TPS74xx is offered in 1.5-V, 1.8-V, 2.5-V, 3-V, and 3.3-V. Output voltage tolerance is specified as a maximum of 3% over line, load, and temperature ranges. The TPS74xx family is available in 8 pin SOIC package.
TPS7433 DROPOUT VOLTAGE
vs JUNCTION TEMPERATURE 300 VI = 3.2 V
250
IO = 200 mA 200
TPS7418 LOAD TRANSIENT RESPONSE
100
50
di/dt =
200 mA 25 µs
CO = 10 µF
0
–50
∆ VO – Change in Output Voltage – mV
150
IO – Output Current – mA
VDO – Dropout Voltage – mV
100 IO = 75 mA
IO = 50 mA 50
IO = 1 mA
0 –50 –25
0 25 50 75 100 125 TJ – Junction Temperature – °C
150
200 0
0 100 200 300 400 500 600 700 800 900 1000 t – Time – µs
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.
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.
•POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1999, Texas Instruments Incorporated 1
TPS7430: Not Recommended For New Designs
TPS7415, TPS7418, TPS7425, TPS7430, TPS7433 FAST-TRANSIENT-RESPONSE USING SMALL OUTPUT CAPACITOR 200-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS212 – DECEMBER 1999
AVAILABLE OPTIONS
OUTPUT VOLTAGE (V)
TJ TYP
PACKAGED DEVICES
SOIC (D)
3.3 TPS7433D
3 TPS7430D
– 40°C to 125°C
2.5
TPS7425D
1.8 TPS7418D
1.5 TPS7415D
The D package is available taped and reeled. Add an R suffix to the device type (e.g., TPS7433DR).
VI 1 µF
TPS74xx
4 IN
5 IN
SENSE 8
1 EN
7 OUT
GND 6
SENSE
VO CO† + 1 µF ESR
† See application information section for capacitor selection details.
Figure 1. Typical Application Configuration functional block diagram
IN EN
_ +
R1 Vref
R2
GND
OUT SENSE
•2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
TERMINAL
NAME
NO.
EN 1
GND
6
IN 4, 5
NC 2, 3
OUT
7
SENSE
8
TPS7430: Not Recommended For New Designs
TPS7415, TPS7418, TPS7425, TPS7430, TPS7433 FAST-TRANSIENT-RESPONSE USING SMALL OUTPUT CAPACITOR
200-mA LOW-DROPOUT VOLTAGE REGULATORS
SLVS212 – DECEMBER 1999
Terminal Functions
I/O
I Enable input Regulator ground
I Input voltage Not connected
O Regulated output voltage I Sense
DESCRIPTION
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)Ĕ
Input voltage range‡, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 8 V Voltage range at EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to VI + 0.3 V Peak output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See dissipation rating tables Operating virtual junction temperature range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 40°C to 125°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
‡ All voltage values are with respect to.