MAX889

High-Frequency, Regulated, 200mA, Inverting Charge Pump

Regulated Inverting Charge Pump Delivers 200mA for Negative Supply without Inductors

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Status Explanations for product status codes

Active: In Production.

Description

The MAX889 inverting charge pump delivers a regulated negative output voltage at loads of up to 200mA. The device operates with inputs from 2.7V to 5.5V to produce an adjustable, regulated output from -2.5V to -VIN.

The MAX889 is available with an operating frequency of 2MHz (T version), 1MHz (S version), or 0.5MHz (R version). The higher switching frequency devices allow the use of smaller capacitors for space-limited applications. The lower frequency devices have lower quiescent current.

The MAX889 also features a 0.1µA logic-controlled shutdown mode and is available in an 8-pin SO package. An evaluation kit, MAX889SEVKIT, is available.
 

Data Sheet

Download this datasheet in PDF formatDownload Rev 0 (PDF, 312kB)
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An evaluation kit is available: MAX889SEVKIT

Key Features

  • 200mA Output Current
  • Up to 2MHz Switching Frequency
  • Small Capacitors (1µF)
  • +2.7V to +5.5V Input Voltage Range
  • Adjustable Regulated Negative Output (-2.5V to -VIN)
  • 0.1µA Logic-Controlled Shutdown
  • Low 0.05Ω Output Resistance (in regulation)
  • Soft-Start and Foldback Current Limited
  • Short-Circuit and Thermal Shutdown Protected
  • 8-Pin SO Package
 

Applications/Uses

  • Battery-Powered Applications
  • Camcorders
  • Digital Still Cameras
  • Hard Disk Drive
  • Measurement Instrumentation
  • TFT Panels
   

Key Specifications:

Charge Pumps
Part Number Topology VIN
(V)
VIN
(V)
ICC
(mA)
Unadj. VOUT
(V)
Adj. VOUT
(V)
Adj. VOUT
(V)
IOUT
(A)
Oper. Freq.
(kHz)
Oper. Temp.
(°C)
Package/Pins Smallest Available Pckg.
(mm2)
Budgetary Price
min max max min max typ max w/pins See Notes
MAX889R 
Inverter
Regulated
2.7 5.5 7 -VIN -VIN -2.5 0.2 500 -40 to +85
SOIC(N)/8
30.9 $2.15 @1k
MAX889S  12 1000
SOIC(N)/8
$2.15 @1k
MAX889T  22 2000
SOIC(N)/8
$2.15 @1k
See All Charge Pumps (45)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


Diagram

MAX889: Typical Operating Circuit
Typical Operating Circuit

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Information Index

Document Ref.: 19-1774 Rev 0; 2000-10-04
This page last modified: 2007-06-13




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