TLF50281EL Infineon Technologies, TLF50281EL Datasheet - Page 3

• Manufacturer Part Number: TLF50281EL
• Manufacturer: Infineon Technologies

Specifications of TLF50281EL

• Packages: PG-SSOP-14
• Comment: Asyncronous low-Iq-Buck; 5V/500mA; Iq
• Vq (max): 5V
• Iq (max): 500.0 mA
• Iq (typ): 45.0 µA
• Output: Buck Converter

2.2 MHz Step-Down Regulator 500 mA, low quiescent
current
TLF50281EL
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Description
The TLF50281EL is a high frequency PWM step-down DC/DC converter with an integrated PMOS power switch,
packaged in a small PG-SSOP-14 with exposed pad. The wide input voltage range from 4.75 to 45 V makes the
TLF50281EL suitable for a wide variety of applications. The device is designed to be used under harsh automotive
environmental conditions.
The switching frequency of nominal 2.2 MHz allows the use of small and cost-effective inductors and capacitors,
resulting in a low, predictable output voltage ripple and in minimized consumption of board space.
In light load condition the device operates in Pulse Frequency Modulation (PFM) to optimize the efficiency.
Between the single pulses, all internal controlling circuitry is switched off to reduce the internal power consumption.
Type
5.0V-Version
Data Sheet
500 mA step down voltage regulator
5 V Output voltage
± 2% output voltage tolerance
Low quiescent current (less than 45µA at nominal battery voltage)
Integrated power transistor
Current mode PWM regulation
PFM mode for light load current
Input voltage range from 4.75V to 45V
2.2 MHz switching frequency
100% Duty cycle
Synchronization input
Very low shutdown current consumption (<2 µA)
Soft-start function
Reset generator
Watchdog
Input undervoltage lockout
Suited for automotive applications:
Green Product (RoHS compliant)
AEC Qualified
Overview
Package
PG-SSOP-14
T
j
= -40 °C to +150 °C
3
Marking
TLF50281EL
PG-SSOP-14
Rev. 1.0, 2011-10-24
5.0V-Version