TPS78928 REGULATORS Datasheet

TPS78928 Datasheet, PDF, Equivalent


Part Number

TPS78928

Description

LOW-DROPOUT LINEAR REGULATORS

Manufacture

etcTI

Total Page 20 Pages
Datasheet
Download TPS78928 Datasheet


TPS78928
TPS78915, TPS78918, TPS78925, TPS78928, TPS78930
ULTRALOW-POWER LOW-NOISE 100-mA
LOW-DROPOUT LINEAR REGULATORS
SLVS300A – SEPTEMBER 2000 – REVISED MAY 2001
D 100-mA Low-Dropout Regulator
D Available in 1.5-V, 1.8-V, 2.5-V, 2.8-V, 3.0-V
D Output Noise Typically 56 µVRMS
(TPS78930)
D Only 17 µA Quiescent Current at 100 mA
D 1 µA Quiescent Current in Standby Mode
D Dropout Voltage Typically 115 mV at 100 mA
(TPS78930)
D Over Current Limitation
D –40°C to 125°C Operating Junction
Temperature Range
D 5-Pin SOT-23 (DBV) Package
description
The TPS789xx family of low-dropout (LDO)
voltage regulators offers the benefits of
low-dropout voltage, ultralow-power operation,
low-output noise, and miniaturized packaging.
These regulators feature low-dropout voltages
and ultralow quiescent current compared to
conventional LDO regulators. An internal resistor,
in conjunction with an external bypass capacitor,
creates a low-pass filter to reduce the noise. The
TPS78930 exhibits only 56 µVRMS of output
voltage noise using 0.01 µF bypass and 10 µF
output capacitors. Offered in a 5-terminal small
outline integrated-circuit SOT-23 package, the
TPS789xx series devices are ideal for
micropower operations, low output noise, and
where board space is limited.
The usual PNP pass transistor has been replaced
by a PMOS pass element. Because the PMOS
pass element behaves as a low-value resistor, the
dropout voltage is very low, typically 115 mV at
100 mA of load current (TPS78930), and is
directly proportional to the load current. The
quiescent current is ultralow (17 µA typically) and
is stable over the entire range of output load
current (0 mA to 100 mA). Intended for use in
portable systems such as laptops and cellular
phones, the ultralow-dropout voltage feature and
ultralow-power operation result in a significant
increase in system battery operating life.
DBV PACKAGE
(TOP VIEW)
IN 1 5 OUT
GND
2
EN 3 4 BYPASS
TPS78930
GROUND CURRENT
vs
JUNCTION TEMPERATURE
21
VI = 4 V
20 Co = 4.7 µF
19 IO = 100 mA
18 IO = 1 mA
17
16
15
14
–40 –25 –10 5 20 35 50 65 80 95 110 125
TJ – Junction Temperature – °C
TPS78930
OUTPUT SPECTRAL NOISE DENSITY
vs
1200
FREQUENCY
1000
VI = 4 V
Co = 4.7 µF
C(byp) = 0.1 µF
800
600
IO = 100 mA
400
200 IO = 1 mA
0
100 1k 10k 100k
f – Frequency – Hz
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 2001, Texas Instruments Incorporated
1

TPS78928
TPS78915, TPS78918, TPS78925, TPS78928, TPS78930
ULTRALOW-POWER LOW-NOISE 100-mA
LOW-DROPOUT LINEAR REGULATORS
SLVS300A SEPTEMBER 2000 REVISED MAY 2001
description (continued)
The TPS789xx also features a logic-enabled sleep mode to shut down the regulator, reducing quiescent current
to 1 µA typical at TJ = 25°C. The TPS789xx is offered in 1.5 V, 1.8 V, 2.5 V, 2.8 V, and 3.0 V.
AVAILABLE OPTIONS
TJ VOLTAGE PACKAGE
1.5 V
40°C to 125°C
1.8 V
2.5 V
2.8 V
SOT-23
(DBV)
3.0 V
The DBVT indicates tape and reel of 250 parts.
The DBVR indicates tape and reel of 3000 parts.
PART NUMBER
TPS78915DBVTTPS78915DBVR
TPS78918DBVTTPS78918DBVR
TPS78925DBVTTPS78925DBVR
TPS78928DBVTTPS78928DBVR
TPS78930DBVTTPS78930DBVR
SYMBOL
PDWI
PDXI
PDYI
PDZI
PEAI
functional block diagram
IN
EN
150 k
Vref
GND
TPS78915/18/25/28/30
Current Limit
/ Thermal
Protection
OUT
Bypass
Terminal Functions
TERMINAL
NAME NO.
BYPASS 4
EN
GND
IN
OUT
3
2
1
5
I/O DESCRIPTION
I The external bypass capacitor, in conjunction with an internal resistor, creates a low-pass filter to further reduce
regulator noise.
I Active low enable.
Regulator ground
I The IN terminal is the input to the device.
O The OUT terminal is the regulated output of the device.
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Features TPS78915, TPS78918, TPS78925, TPS78928, TPS78930 ULTRALOW-POWER LOW-NOISE 100-m A LOW-DROPOUT LINEAR REGULATORS SLVS300 A – SEPTEMBER 2000 – REVISED MAY 20 01 D 100-mA Low-Dropout Regulator D Av ailable in 1.5-V, 1.8-V, 2.5-V, 2.8-V, 3.0-V D Output Noise Typically 56 µVRM S (TPS78930) D Only 17 µA Quiescent Cu rrent at 100 mA D 1 µA Quiescent Curre nt in Standby Mode D Dropout Voltage Ty pically 115 mV at 100 mA (TPS78930) D O ver Current Limitation D –40°C to 12 5°C Operating Junction Temperature Ran ge D 5-Pin SOT-23 (DBV) Package descrip tion The TPS789xx family of low-dropout (LDO) voltage regulators offers the be nefits of low-dropout voltage, ultralow -power operation, low-output noise, and miniaturized packaging. These regulato rs feature low-dropout voltages and ult ralow quiescent current compared to con ventional LDO regulators. An internal r esistor, in conjunction with an externa l bypass capacitor, creates a low-pass filter to reduce the noise. The TPS78930 exhibits only 56 µVRMS of output .
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