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LMR70503

ACTIVE

2.8V to 5.5V, 300mA Buck/Boost Negative Output Voltage Regulator

Product details

Topology Inverting Vin (min) (V) 2.8 Vin (max) (V) 5.5 Vout (max) (V) -0.9 Vout (min) (V) -5.5 Duty cycle (max) (%) 90 Features Enable Switch current limit (typ) (A) 0.32 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 1000 Iq (typ) (mA) 0.3 Rating Catalog Operating temperature range (°C) -40 to 125 Type Converter
Topology Inverting Vin (min) (V) 2.8 Vin (max) (V) 5.5 Vout (max) (V) -0.9 Vout (min) (V) -5.5 Duty cycle (max) (%) 90 Features Enable Switch current limit (typ) (A) 0.32 Switching frequency (min) (kHz) 500 Switching frequency (max) (kHz) 1000 Iq (typ) (mA) 0.3 Rating Catalog Operating temperature range (°C) -40 to 125 Type Converter
DSBGA (YFX) 8 1.8 mm² 1.8 x 1
  • Tiny 8-Bump Thin DSBGA Package: 0.84 mm × 1.615 mm × 0.6 mm
  • 2.8 V to 5.5 V Input Voltage Range
  • Adjustable Output Voltage: -0.9 V to -5.5 V
  • 320 mA Switch Current Limit
  • 500 kHz Minimum Switching Frequency
  • Ground Referred Enable Input
  • Under Voltage Lock Out (UVLO)
  • No External Compensation
  • Internal Soft Start
  • 1 µA Shutdown Supply Current
  • Small Output Voltage Ripple
  • WEBENCH Enabled

Performance Benefits

  • Easy To Use
  • Tiny Overall Solution Size Reduces System Cost

SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

  • Tiny 8-Bump Thin DSBGA Package: 0.84 mm × 1.615 mm × 0.6 mm
  • 2.8 V to 5.5 V Input Voltage Range
  • Adjustable Output Voltage: -0.9 V to -5.5 V
  • 320 mA Switch Current Limit
  • 500 kHz Minimum Switching Frequency
  • Ground Referred Enable Input
  • Under Voltage Lock Out (UVLO)
  • No External Compensation
  • Internal Soft Start
  • 1 µA Shutdown Supply Current
  • Small Output Voltage Ripple
  • WEBENCH Enabled

Performance Benefits

  • Easy To Use
  • Tiny Overall Solution Size Reduces System Cost

SIMPLE SWITCHER is a trademark of Texas Instruments. WEBENCH is a trademark of Texas Instruments. All trademarks are the property of their respective owners.

The LMR70503 is a buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin DSBGA package. 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, and Under Voltage Lock Out (UVLO), with no external compensation required. For ease of use, the Enable pin is referred to the IC ground, instead of the lowest potential of the IC: the negative output voltage.

The LMR70503 is a buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin DSBGA package. 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, and Under Voltage Lock Out (UVLO), with no external compensation required. For ease of use, the Enable pin is referred to the IC ground, instead of the lowest potential of the IC: the negative output voltage.

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Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LMR70503EVM — LMR70503 Evaluation Module

The LMR70503 is an inverting buck-boost converter with adjustable negative output voltage in a tiny 8-bump thin micro SMD package (0.84 mm × 1.615 mm × 0.6 mm). Its unique control method is designed to provide fast transient response, low outputnoise, high efficiency, and tight regulation in the (...)
User guide: PDF
Not available on TI.com
Simulation model

LMR70503 Unencrypted PSpice Transient Model

SNVM973.ZIP (3 KB) - PSpice Model
Simulation model

LMR70503 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM473A.ZIP (84 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Schematic: PDF
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This reference design is part of an analog front-end for 50Ω-input oscilloscope application. System designers can readily use this evaluation platform to process input signals from DC to 2 GHz in both frequency-domain and time-domain applications.
Design guide: PDF
Schematic: PDF
Package Pins Download
DSBGA (YFX) 8 View options

Ordering & quality

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