Texas Instruments LMR70503 Evaluation Module LMR70503EVM/NOPB LMR70503EVM/NOPB 数据表
产品代码
LMR70503EVM/NOPB
User's Guide
SNVU155A – June 2012 – Revised April 2013
AN-2264 LMR70503 Demo Board
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Introduction
The LMR70503 is an inverting buck-boost converter with adjustable negative output voltage in a tiny 8-
bump DSBGA package (0.84 mm × 1.615 mm × 0.6 mm). Its unique control method is designed to
provide fast transient response, low output noise, high efficiency, and tight regulation in the smallest
possible PCB area. The LMR70503 has built in soft start, peak current limit, minimum switching frequency
limit, and Under Voltage Lock Out (UVLO), with no external compensation required. For ease of use, the
EN pin is referred to the IC ground instead of the negative output voltage. The LMR70503 is operating in
Discontinuous Conduction Mode (DCM) in light load. The minimum switching frequency is limited to 500
kHz to avoid audio frequency interference to other systems. Very small total solution size can be achieved
with the tiny footprint of the LMR70503 and the low external component count.
bump DSBGA package (0.84 mm × 1.615 mm × 0.6 mm). Its unique control method is designed to
provide fast transient response, low output noise, high efficiency, and tight regulation in the smallest
possible PCB area. The LMR70503 has built in soft start, peak current limit, minimum switching frequency
limit, and Under Voltage Lock Out (UVLO), with no external compensation required. For ease of use, the
EN pin is referred to the IC ground instead of the negative output voltage. The LMR70503 is operating in
Discontinuous Conduction Mode (DCM) in light load. The minimum switching frequency is limited to 500
kHz to avoid audio frequency interference to other systems. Very small total solution size can be achieved
with the tiny footprint of the LMR70503 and the low external component count.
Top View
Bottom View
Figure 1. LMR70503 Demo Board
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SNVU155A – June 2012 – Revised April 2013
AN-2264 LMR70503 Demo Board
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