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TI(德州仪器) LM2703
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  • TI(德州仪器) LM2703
  • TI(德州仪器) LM2703
  • TI(德州仪器) LM2703
  • TI(德州仪器) LM2703
  • TI(德州仪器) LM2703
  • TI(德州仪器) LM2703
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LM2703

LM2703

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具有 350mA 峰值电流限制的微功耗升压 DC/DC 转换器

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The LM2703 is a micropower step-up DC/DC in a small 5-lead SOT-23 package. A current limited, fixed off-time control scheme conserves operating current resulting in high efficiency over a wide range of load conditions. The 22V switch allows for output voltages as high as 21V. The low 400ns off-time permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications. The LM2703 is ideal for LCD panels requiring low current and high efficiency as well as white LED applications for cellular phone back-lighting. The LM2703 can drive up to 4 white LEDs from a single Li-Ion battery.

  • 350mA, 0.7Ω, Internal Switch
  • Uses Small Surface Mount Components
  • Adjustable Output Voltage up to 21V
  • 2.2V to 7V Input Range
  • Input Undervoltage Lockout
  • 0.01µA Shutdown Current
  • Small 5-Lead SOT-23 Package

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TopologyBoost
Vin (min) (V)2.2
Vin (max) (V)7
Vout (min) (V)1.24
Vout (max) (V)21
Switch current limit (typ) (A)0.35
TypeConverter
Regulated outputs (#)1
Switching frequency (min) (kHz)600
Switching frequency (max) (kHz)2500
Iq (typ) (mA)0.235
FeaturesEnable, Nonsynchronous rectification
Duty cycle (max) (%)76
Operating temperature range (°C)-40 to 85
RatingCatalog
SOT-23 (DBV)58.12 mm² 2.9 x 2.8
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