TLF50251ELV50 Regulator Datasheet

TLF50251ELV50 Datasheet PDF, Equivalent


Part Number

TLF50251ELV50

Description

2.2MHz Step-Down Regulator

Manufacture

Infineon

Total Page 30 Pages
Datasheet
Download TLF50251ELV50 Datasheet


TLF50251ELV50
TLF50251ELV50
2.2 MHz Step-Down Regulator 500 mA, 5 V, low quiescent current
1 Overview
Features
• 500 mA step down voltage regulator
• 5 V Output voltage
• ±2% output voltage tolerance
• Low quiescent current (less than 45 µA at nominal battery voltage)
• Integrated power transistor
• Current mode PWM regulation
• PFM mode for light load current
• Input voltage range from 4.75 V to 45 V
• 2.2 MHz switching frequency
• 100% Duty cycle
• Synchronization input
• Very low shutdown current consumption (< 2 µA)
• Soft-start function
• Reset generator
• Input undervoltage lockout
• Suited for automotive applications: Tj = -40°C to 150°C
• Green Product (RoHS compliant)
Potential applications
• Applications with a 5.0 V switching regulator as replacement for linear voltage regulator with low
quiescent current, such as:
– dashboard
– engine management
– braking
– body
– infotainment
Data Sheet
www.infineon.com
1
Rev. 1.1
2018-03-07

TLF50251ELV50
TLF50251ELV50
2.2 MHz Step-Down Regulator 500 mA, 5 V, low quiescent current
Overview
Product validation
Qualified for automotive applications. Product Validation according to AEC-Q100/101.
Description
The TLF50251EL 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 V to 45 V makes
the TLF50251EL 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.
The TLF50251EL includes protection features such as a cycle-by-cycle current limitation, overtemperature
shutdown and input undervoltage lockout. The enable function, in shutdown mode with less than 2 µA
current consumption, enables easy power management in battery-powered systems.
The voltage regulation loop provides an excellent line and load regulation, the stability of the loop is ensured
by an internal compensation network. This compensation network combined with a current mode regulation
control guarantees a highly effective line transient rejection. During start-up the integrated soft-start limits
the inrush current peak and prevents output voltage overshoot.
Type
TLF50251EL
Package
PG-SSOP-14
Marking
TLF50251
Data Sheet
2
Rev. 1.1
2018-03-07


Features TLF50251ELV50 2.2 MHz Step-Down Regulato r 500 mA, 5 V, low quiescent current 1 Overview Features • 500 mA step down voltage regulator • 5 V Output volta ge • ±2% output voltage tolerance Low quiescent current (less than 45 A at nominal battery voltage) • Inte grated power transistor • Current mod e PWM regulation • PFM mode for light load current • Input voltage range f rom 4.75 V to 45 V • 2.2 MHz switchin g frequency • 100% Duty cycle • Syn chronization input • Very low shutdow n current consumption (< 2 µA) • Sof t-start function • Reset generator Input undervoltage lockout • Suited for automotive applications: Tj = -40 C to 150°C • Green Product (RoHS co mpliant) Potential applications • App lications with a 5.0 V switching regula tor as replacement for linear voltage r egulator with low quiescent current, su ch as: – dashboard – engine managem ent – braking – body – infotainme nt Data Sheet www.infineon.com 1 Rev. 1.1 2018-03-07 TLF50251ELV50 2.2 MHz Step-Down Regulator 500 mA, 5 V, lo.
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