MAX889
High-Frequency, Regulated, 200mA, Inverting Charge Pump
Regulated Inverting Charge Pump Delivers 200mA for Negative Supply without Inductors
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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.
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
| Topology | Inverter Regulated |
| VIN (V) (min) | 2.7 |
| VIN (V) (max) | 5.5 |
| IOUT (A) (typ) | 0.2 |
| Unadj. VOUT (V) | -VIN |
| Adj. VOUT (V) (min) | -VIN |
| Adj. VOUT (V) (max) | -2.5 |
| ICC (mA) (max) | 7 |
| Switching Frequency (kHz) | 500 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC(N)/8 |
| Budgetary Price (See Notes) | $2.22 @1k |
Technical Docs
| Data Sheet | High-Frequency, Regulated, 200mA, Inverting Charge Pump | Oct 04, 2000 | |
| App Note | Simple Circuit Converts +5V to -10V | ||
| Tutorial | Choosing the Right Power-Supply IC for your Application |
Click any title below to view the detail page where available.
Description
The MAX889 IC is an inverting charge pump that delivers a regulated negative output voltage at loads up to 200mA. The device operates from an input of +2.7V to +5.5V to produce a user-adjustable, regulated output of -2.5V to -VIN.
The MAX889S evaluation kit (EV kit) is a fully assembled and tested surface-mount board. The board is set up to provide a -3.3V output from a +5.0V input supply. The EV kit is shipped with a MAX889S (1MHz switching frequency) installed. The board may also be used to evaluate the MAX889R (500kHz) or the MAX889T (2MHz). To do so, request a free sample of the MAX889RESA or MAX889TESA, and refer to the MAX889 data sheet for the appropriate capacitor values.
Features
- +2.7V to +5.5V Input Range
- Uses One 2.2µF and Two 10µF Ceramic Capacitors
- Output Adjustable from -2.5V to -VIN
- 200mA Output Current
- 1MHz Switching Frequency
- Fully Assembled and Tested Surface-Mount Board
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Parameters
| Topology | Inverter Regulated |
| VIN (V) (min) | 2.7 |
| VIN (V) (max) | 5.5 |
| IOUT (A) (typ) | 0.2 |
| Unadj. VOUT (V) | -VIN |
| Adj. VOUT (V) (min) | -VIN |
| Adj. VOUT (V) (max) | -2.5 |
| ICC (mA) (max) | 7 |
| Switching Frequency (kHz) | 500 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | SOIC(N)/8 |
| Budgetary Price (See Notes) | $2.22 @1k |
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
Description
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.
Technical Docs
| Data Sheet | High-Frequency, Regulated, 200mA, Inverting Charge Pump | Oct 04, 2000 | |
| App Note | Simple Circuit Converts +5V to -10V | ||
| Tutorial | Choosing the Right Power-Supply IC for your Application |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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