LM2727

ACTIVE

2.2 - 16V input, 2MHz, N-Channel FET synchronous buck controller w output over V & under V latch-off

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Product details

Parameters

Vin (Min) (V) 2.2 Vin (Max) (V) 16 Vout (Min) (V) 0.6 Vout (Max) (V) 13.5 Iout (Max) (A) 20 Regulated outputs (#) 1 Number of Phases 1 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 2000 Iq (Typ) (mA) 1.5 Features Enable Duty cycle (Max) (%) 90 Operating temperature range (C) 0 to 125 Type Controller Rating Catalog Control mode Voltage Mode open-in-new Find other Buck controllers (external switch)

Package | Pins | Size

TSSOP (PW) 14 32 mm² 5 x 6.4 open-in-new Find other Buck controllers (external switch)

Features

  • Input Power from 2.2V to 16V
  • Output Voltage Adjustable Down to 0.6V
  • Power Good flag, Adjustable Soft-Start and Output Enable for Easy Power Sequencing
  • Output Over-Voltage and Under-Voltage Latch-Off (LM2727)
  • Output Over-Voltage and Under-Voltage Flag (LM2737)
  • Reference Accuracy: 1.5% (0°C - 125°C)
  • Current Limit Without Sense Resistor
  • Soft Start
  • Switching Frequency from 50 kHz to 2 MHz
  • TSSOP-14 Package

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Description

The LM2727 and LM2737 are high-speed, synchronous, switching regulator controllers. They are intended to control currents of 0.7A to 20A with up to 95% conversion efficiencies. The LM2727 employs output over-voltage and under-voltage latch-off. For applications where latch-off is not desired, the LM2737 can be used. Power up and down sequencing is achieved with the power-good flag, adjustable soft-start and output enable features. The LM2737 and LM2737 operate from a low-current 5V bias and can convert from a 2.2V to 16V power rail. Both parts utilize a fixed-frequency, voltage-mode, PWM control architecture and the switching frequency is adjustable from 50kHz to 2MHz by adjusting the value of an external resistor. Current limit is achieved by monitoring the voltage drop across the on-resistance of the low-side MOSFET, which enhances low duty-cycle operation. The wide range of operating frequencies gives the power supply designer the flexibility to fine-tune component size, cost, noise and efficiency. The adaptive, non-overlapping MOSFET gate-drivers and high-side bootstrap structure helps to further maximize efficiency. The high-side power FET drain voltage can be from 2.2V to 16V and the output voltage is adjustable down to 0.6V.

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Technical documentation

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Type Title Date
* Datasheet LM2727/2737 N-Chan FET Synch Buck Reg Cntrlr for Low Output Volt datasheet (Rev. D) Mar. 28, 2013
Application notes Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics Jul. 21, 2016
User guides AN-1325 LM2742 Evaluation Board (Rev. A) May 01, 2013
User guides AN-1247 LM2727 Evaluation Board (Rev. C) Apr. 26, 2013

Design & development

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Hardware development

EVALUATION BOARDS Download
document-generic User guide
$99.00
Description

N-Channel FET Synchronous Buck Regulator Controller

Features
  • Input from 2.2V to 16V
  • Output adjustable down to 0.6V
  • Power Good flag and output enable
  • Output under-voltage and over-voltage latch-off (LM2727 only)
  • Reference Accuracy: 1.5% over temperature
  • Current limit without sense resistor
  • Soft start
  • Switching frequency from 50 kHz to 2 MHz
  • Tiny plastic TSSOP-14 (...)

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 14 View options

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