TPS7A24 200-mA, 18-V, Ultra-Low IQ, Low-Dropout Voltage Regulator

1 Features

Ultra-low I_Q: 2.0 μA
Input voltage: 2.4 V to 18 V
Output voltage options available:
- Fixed: 1.25 V to 5.5 V
- Adjustable: 1.24 V to 17.75 V
1.25% accuracy over temperature
Low dropout: 250 mV (max) at 200 mA
Active overshoot pulldown protection
Thermal shutdown and overcurrent protection
Operating junction temperature: –40°C to +125°C
Stable with 1-µF output capacitors
Package: 5-pin SOT-23

2 Applications

3 Description

The TPS7A24 low-dropout (LDO) linear voltage regulator supports a 2.4-V to 18-V input voltage range with ultra-low quiescent current (I_Q). These features help modern appliances meet increasingly stringent energy requirements and help extend battery life in portable-power solutions.

The TPS7A24 is available in both fixed and adjustable versions. The fixed-voltage version eliminates external resistors and minimizes printed circuit board (PCB) area. For more flexibility or higher output voltages, the adjustable version uses feedback resistors to set the output voltage from 1.24 V to 17.75 V. Both versions have 1.25% output regulation accuracy that provides precision regulation for microcontroller (MCU) references.

The TPS7A24 LDO operates more efficiently than standard linear regulators because the maximum dropout voltage is less than 250 mV at 200 mA of current. This maximum dropout voltage allows for 92.8% efficiency from a 3.55-V input voltage (V_IN) to a 3.3-V output voltage (V_OUT).

Package Information⁽¹⁾

PART NUMBER	PACKAGE	BODY SIZE (NOM)
TPS7A24	DBV (SOT-23, 5)	2.90 mm × 1.60 mm

(1) For all available packages, see the package option addendum at the end of the data sheet.

Typical Application Circuit

Quiescent Current vs Input Voltage
(V_OUT = 1.24 V, I_OUT = 0 A)

4 Revision History

Changes from Revision D (May 2022) to Revision E (September 2022)

Changed Dropout Voltage vs V_IN and Dropout Voltage vs I_OUT figures in Typical Characteristics sectionGo

Changes from Revision C (January 2022) to Revision D (May 2022)

Added Output voltage accuracy at 25 ℃ to Electrical Characteristics tableGo

5 Pin Configuration and Functions

Figure 5-1 DBV Package (Adjustable),
5-Pin SOT-23(Top View)

Figure 5-2 DBV Package (Fixed),5-Pin SOT-23(Top View)

Table 5-1 Pin Functions

PIN			I/O	DESCRIPTION
NAME	DBV (Adjustable)	DBV (Fixed)	I/O	DESCRIPTION
EN	3	3	Input	Enable pin. Drive EN greater than V_EN(HI) to enable the regulator. Drive EN less than V_EN(LOW) to put the regulator into low-current shutdown. Do not float this pin. If not used, connect EN to IN.
FB	4	—	Input	Feedback pin. Input to the control-loop error amplifier. This pin is used to set the output voltage of the device with the use of external resistors. For adjustable-voltage version devices only.
GND	2	2	—	Ground pin.
IN	1	1	Input	Input pin. For best transient response and to minimize input impedance, use the recommended value or larger capacitor from IN to ground as listed in the Section 6.3 table. Place the input capacitor as close to the IN and GND pins of the device as possible.
NC	—	4	—	No internal connection. For fixed-voltage version devices only. This pin can be floated but the device has better thermal performance with this pin tied to GND.
OUT	5	5	Output	Output pin. A capacitor is required from OUT to ground for stability. For best transient response, use the nominal recommended value or larger capacitor from OUT to ground. Follow the recommended capacitor value as listed in the Section 6.3 table. Place the output capacitor as close to the OUT and GND pins of the device as possible.