ISL80121-5

1A Ultra Low Dropout Linear Regulator with Programmable Current Limiting

OVERVIEW

The ISL80121-5 is a low dropout voltage, single output LDO with programmable current limiting. The ISL80121-5 operates from input voltages of 5V to 6V with a nominal output voltage of 5V. Other custom voltage options are available upon request.

A submicron BiCMOS process is utilized for this product family to deliver the best in class analog performance and overall value. The programmable current limiting improves system reliability of end applications. An external capacitor on the soft-start pin provides an adjustable soft-starting ramp. The ENABLE feature allows the part to be placed into a low quiescent current shutdown mode.

This BiCMOS LDO will consume significantly lower quiescent current as a function of load compared to bipolar LDOs, which translates into higher efficiency and packages with smaller footprints. Quiescent current is modestly compromised to achieve a very fast load transient response.

KEY FEATURES

  • ±1.8% VOUT accuracy guaranteed over line, load and TJ = -40°C to +125°C
  • Very low 130mV dropout voltage
  • High accuracy current limit programmable up to 1.75A
  • Very fast transient response
  • 210µVRMS output noise
  • Power-good output
  • Programmable soft-start
  • Over-temperature protection
  • Small 10 Ld DFN package

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL80121-5
Basic Information
生产状态
Mass Production
输入电压最小值 (V)
2.2
输入电压最大值 (V)
6
外部偏置
No
输出电压最小值 (V)
0.8
输出电压最大值 (V)
5
固定输出电压选项
Yes
O/P电压精度 (%)
±1.8
输出电流1最大值 (A)
1
PSRR (dB)
40
资质级别
Standard
噪声 (μVRMS 10Hz至100kHz)
210
压降典型值 (mV)
90 @ 1A
启用/关闭
Yes
PGOOD输出
Yes
输入电压范围 (V)
2.2 to 6.0
输出电压范围 (V)
0.8 to 5.0
CAN 采样
YES
温度范围
-40 to +125

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