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2.5V to 5.0V, 0.5A/2.5A, Charge/Discharge Regulator for Supercapacitor Backup Applications

Continua™ Family of Backup Power Regulators Using Supercapacitor or Capacitor Bank

产品详情

主要特征

Parametric specs for Battery Chargers
Charging VIN (V) (max) 5.5
Max. ICHG (A) 2.5
Cell Chemistry Supercapacitor
Charger (V) 0.8 to 5
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN-CU/14
Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.8
VIN (V) (max) 4.5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 5
IOUT1 (A) (max) 2.5
Switch Type Internal
Output Adjust. Method Resistor
ICC (mA) (typ) 0.035
# DC-DC Outputs 1
Switching Frequency (kHz) 2000
Design Tools EE-Sim
Package/Pins TDFN-CU/14
Budgetary
Price (See Notes)
1.9
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参量

Parametric specs for Battery Chargers
Charging VIN (V) (max) 5.5
Max. ICHG (A) 2.5
Cell Chemistry Supercapacitor
Charger (V) 0.8 to 5
Oper. Temp. (°C) -40 to +125
Package/Pins TDFN-CU/14
Parametric specs for Step-Up Switching Regulators
VIN (V) (min) 0.8
VIN (V) (max) 4.5
VOUT1 (V) (min) 2.5
VOUT1 (V) (max) 5
IOUT1 (A) (max) 2.5
Switch Type Internal
Output Adjust. Method Resistor
ICC (mA) (typ) 0.035
# DC-DC Outputs 1
Switching Frequency (kHz) 2000
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=25686', '')
Package/Pins TDFN-CU/14
Budgetary
Price (See Notes)
1.9

主要特征

  • 2.5V to 5V System Output Voltage
  • Up to 4.5V Capacitor Voltage Range
  • Up to 2.5A Peak Inductor Discharge Current
  • Programmable Voltage and Current Thresholds
  • ±2% Threshold Accuracy
  • Up to 95% Efficiency, Charge or Discharge
  • 2.5μA Ready Quiescent Current
  • Small Solution Size
    • 3mm x 3mm x 0.75mm TDFN Package

应用/用途

  • 手持式工业设备
  • 便携式计算机
  • 具有可拆卸电池的便携式设备

描述

The MAX38886 is a storage capacitor or capacitor bank backup regulator designed to efficiently transfer power between a storage element and a system supply rail in reversible buck and boost operations using the same inductor.

When the main supply is present and above the minimum system supply voltage, the regulator operates in buck mode and charges the storage element at up to 500mA peak inductor current. Once the storage element is charged, the circuit draws only 2.5μA of current while it maintains the supercapacitor or other storage element in its ready state. When the main supply is removed, the regulator operates in boost mode and prevents the system from dropping below the minimum operating voltage, discharging the storage element at up to 2.5A peak inductor current.

The MAX38886 is externally programmable for minimum and maximum voltage of the storage element, such as supercapacitor, minimum system voltage, and maximum charge and discharge currents. The internal DC-DC converter requires only a 1µH inductor.

简化框图

MAX38886: Typical Application Circuit MAX38886:Typical Application Circuit Zoom icon

Technical Docs

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在Maxim的知识库中搜索技术问题的答案

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Maxim的专业工程师团队也会为您解答相应的技术问题,请访问Maxim的 支持中心