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- Model
- LM2734
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- 2
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- Last added
- 2012-05-03
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National Semiconductor LM2734 Thin SOT23 1A Load Step-Down DC-DC Regulator Handbook
The LM2734 regulator is a monolithic, high‑frequency PWM step‑down converter packaged in a 6‑pin Thin SOT23‑6. It operates from a 3 V to 20 V input range and provides a selectable 0.8 V to 18 V output at up to 1 A load current. Features include internal soft‑start, pulse‑by‑pulse current limit, thermal shutdown, and an ultra‑low 30 nA shutdown current, making it suitable for space‑constrained designs.
Typical applications listed are battery‑powered devices, USB‑powered devices, DSL modems, notebook computers and automotive systems. The datasheet provides absolute maximum ratings, electrical characteristics, pin descriptions, typical performance curves, and a block diagram to aid designers in implementing the regulator with minimal external components.
National Semiconductor LM2734 specifications
| Input Voltage Range | 3 V to 20 V |
|---|---|
| Output Voltage Range | 0.8 V to 18 V |
| Maximum Output Current | 1 A |
| Switching Frequency | 550 kHz (LM2734Y) or 1.6 MHz (LM2734X) |
| Shutdown (stand‑by) Current | 30 nA |
| Internal Voltage Reference Accuracy | 2 % (typ) |
Source: National Semiconductor LM2734 Thin SOT23 1A Load Step-Down DC-DC Regulator Handbook
All National Semiconductor LM2734 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum input voltage the LM2734 can tolerate?
The device is rated for an input voltage up to 20 V.
From: National Semiconductor LM2734 Thin SOT23 1A Load Step-Down DC-DC Regulator Handbook
How much current does the LM2734 draw in shutdown mode?
In shutdown the regulator draws only 30 nA.
From: National Semiconductor LM2734 Thin SOT23 1A Load Step-Down DC-DC Regulator Handbook
What is the typical switching frequency of the LM2734Z?
The LM2734Z operates at an internally set switching frequency of 3 MHz.
From: NATIONAL SEMICONDUCTOR LM2734Z/LM2734ZQ Thin SOT23 1A Load Step-Down DC-DC Regulator Manual
How much quiescent current does the LM2734Z draw in shutdown mode?
In shutdown mode the device draws about 30 nA of standby current.
From: NATIONAL SEMICONDUCTOR LM2734Z/LM2734ZQ Thin SOT23 1A Load Step-Down DC-DC Regulator Manual