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ADP1876-EVALZ Datasheet(PDF) 1 Page - Analog Devices |
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ADP1876-EVALZ Datasheet(HTML) 1 Page - Analog Devices |
1 / 24 page 600 kHz Dual Output Synchronous Buck PWM Controller with Linear Regulator Data Sheet ADP1876 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2011 Analog Devices, Inc. All rights reserved. FEATURES Wide input range: 2.75 V to 20 V Power stage input voltage: 1 V to 20 V Output voltage range: 0.6 V up to 90% V IN Linear dropout (LDO) regulator with a fixed output 1.5 V at 150 mA Output current more than 25 A per channel 180º phase shift between channels for reduced input capacitance ±0.85% reference voltage accuracy from −40°C to +85°C Integrated boost diodes Independent channel precision enable Overcurrent limit protection Externally programmable soft start, slope compensation, and current sense gain Thermal overload protection Input undervoltage lockout (UVLO) Power good with internal pull-up resistor Available in 32-lead, 5 mm × 5 mm LFCSP APPLICATIONS Consumer applications Telecommunications base station and networking Industrial and instrumentation TYPICAL OPERATION CIRCUIT Figure 1. GENERAL DESCRIPTION The ADP1876 is a dual output dc-to-dc synchronous buck controller operating at 600 kHz fixed frequency with integrated drivers that drive N-channel power MOSFETs. An additional fixed voltage output, 150 mA linear regulator is available for powering low power loads. The device operates in current mode for improved transient response and uses valley current sensing for enhanced noise immunity. The two PWM outputs are phase shifted 180° for reducing the input current ripple and the required input capacitance. The ADP1876 provides high speed, high peak current drive capability with dead time optimization to enable energy efficient power conversion. RAMP1 RRAMP1 VIN DH1 BST1 SW1 ILIM1 FB1 DL1 PGND1 RAMP2 DH2 BST2 SW2 ILIM2 FB2 DL2 PGND2 EN1 EN2 VDL VCCO TRK1 1.5V VINLDO VOUTLDO NC COMP1 COMP2 SS1 SS2 AGND RCSG1 R11 R12 R21 R22 M1 M2 RCSG2 M3 L2 L1 VOUT1 VOUT2 VIN VIN M4 RRAMP2 PGOOD1 3V to 5V INPUT PGOOD2 ADP1876 |
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