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ADP3604 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADP3604 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 8 page REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a SwitchedCapacitorVoltageConverter with Regulated Output ADP3604* © Analog Devices, Inc., 1996 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 Fax: 617/326-8703 GENERAL DESCRIPTION The ADP3604 switched capacitor voltage converter provides a regulated output voltage with minimum voltage loss and re- quires a minimum number of external components. In addi- tion, the ADP3604 does not require the use of an inductor. The ADP3604 provides up to 120 mA of output current with ±3% output accuracy. The internal oscillator runs at 240 kHz nominal frequency which produces an output switching frequency of 120 kHz, al- lowing the use of small charge pump and filter capacitors. The ADP3604 is primarily designed for use as a high fre- quency negative voltage regulator/inverter. The output voltages of the ADP3604 can range from –1.2 V to –4.0 V, nominally –3.0 V. For other output voltages, contact the factory. The ADP3604 dissipates less than 350 mW of power and fea- tures fast shutdown mode capability (<5 ms) that also drops the quiescent current to 1.5 mA (typ). For a lower cost, 50 mA out- put current version, see the ADP3603. *Patent pending. FEATURES Fully Regulated Output High Output Current: 120 mA 50 mA Version (ADP3603) Is Also Available Outstanding Precision: 3% Output Accuracy Input Voltage Range: +4.5 V to +6.0 V Output Voltage: –3.0 V (Regulated) High Switching Frequency: 120 kHz (240 kHz Internal Oscillator) Shutdown Capability Small Outline 8-Pin SOIC Package APPLICATIONS Voltage Inverters Voltage Regulators Computer Peripherals and Add-On Cards Portable Instruments Battery Powered Devices Pagers and Radio Control Receivers Disk Drives Mobile Phones FUNCTIONAL BLOCK DIAGRAM 8 SP D S1 SN D S2 S N D B S3 S N D 7 3 VIN CP– CP+ 1 S4 2 VOUT GND OSC CLOCK GEN 4 SD FEEDBACK CONTROL LOOP 5 VSENSE PIN CONFIGURATION 8-Pin SOIC (SO-8) 1 2 3 4 8 7 6 5 TOP VIEW (Not to Scale) NC = NO CONNECT ADP3604 CP+ VSENSE NC VOUT VIN GND CP– SHUTDOWN ADP3604 8 7 3 C2 4.7µF† 1 4 SHUTDOWN 0 OFF ON C1 4.7µF† VIN +4.5 – +6V VOUT –3.0V C3 4.7µF† 2 5 VSENSE NOTE C2: SPRAGUE, 293D105X0010B2W C1, C3: TOKIN, 1E105ZY5UC205F †FOR BEST PERFORMANCE 10µF IS RECOMMENDED Figure 1. Typical Application Circuit |
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