TPS79801-Q1_15 Datasheet, PDF (1/25 Pages) Texas Instruments – TPS798xx-Q1 50 mA, 3 V to 50 V, Micropower, Low-Dropout Linear Regulator

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TPS79801-Q1, TPS79850-Q1
SLVS822E – MARCH 2009 – REVISED SEPTEMBER 2015
TPS798xx-Q1 50 mA, 3 V to 50 V, Micropower, Low-Dropout Linear Regulator
1 Features
•1 Qualified for Automotive Applications
• Wide Input Voltage Range: 3 V to 50 V
• Low Quiescent Current: 40 μA (Typical)
• Low Dropout Voltage: 300 mV (Typical)
• Output Current: 50 mA
• No Input Protection Diodes Needed
• Adjustable Output From 1.275 V to 28 V
• 1-μA Quiescent Current in Shutdown
• Stable With 1-μF Output Capacitor
• Stable With Aluminum, Tantalum, or Ceramic
Capacitors
• Reverse Input-Battery Protection
• Reverse Output Current Flow Protection
• Thermal Limiting
• Available in an 8-Pin MSOP-PowerPAD IC
Package
2 Applications
• Low-Current, High-Voltage Regulators
• Regulators for Battery-Powered Systems
• Telecom
• Automotives
3 Description
The TPS798xx-Q1 is the first device in a line of 50-V
high-voltage micropower low-dropout (LDO) linear
regulators. This device is capable of supplying 50-mA
output current with a dropout voltage of only 300 mV.
Designed for low quiescent current high voltage (50
V) applications, 40 μA operating and 1 μA in
shutdown makes the TPS798xx-Q1 an ideal choice
for battery-powered or high-voltage systems.
Quiescent current is also well-controlled in dropout.
Other features of the TPS798xx-Q1 include the ability
to operate with low equivalent series resistance
(ESR) ceramic output capacitors. This device is
stable with only 1 μF on the output; most older
devices require from 10-μF to 100-μF tantalum
capacitors for stability. Small ceramic capacitors can
be used without the necessary addition of ESR, as is
common with other regulators. Internal protection
circuitry includes reverse input-battery protection,
reverse output current protection, current limiting, and
thermal limiting to protect the device in various fault
conditions.
This device is available in a fixed output voltage of 5
V (TPS79850) and with an adjustable output voltage
with a 1.275-V reference voltage (TPS79801). The
TPS798xx-Q1 regulator is available in a 8-pin MSOP-
PowerPAD (DGN) package with an exposed pad for
enhanced thermal management capability.
PART
NUMBER
TPS79801-Q1
TPS79850-Q1
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
MSOP-PowerPAD (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Simplified Schematic
IN
OUT
V_OUT
R₂
C₁
V_IN
TPS79801
EN
FB
GND
R₁
V_OUT = 1.275 V (1 + R₂ / R₁) + I_FBR₂
V_FB = 1.275 V
I_FB = 0.2 µA at 25°C
Output Range = 1.275 V to 28 V
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.