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Infineon Technologies Electronic Components Datasheet

TLF50251ELV50 Datasheet

2.2MHz Step-Down Regulator

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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


Infineon Technologies Electronic Components Datasheet

TLF50251ELV50 Datasheet

2.2MHz Step-Down Regulator

No Preview Available !

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


Part Number TLF50251ELV50
Description 2.2MHz Step-Down Regulator
Maker Infineon
Total Page 30 Pages
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