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| 型号： | ADP1876-EVALZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADP1876 |
| 标准包装： | 1 |
| 系列： | * |
600 kHz Dual Output Synchronous Buck
PWM Controller with Linear Regulator
Data Sheet
FEATURES
TYPICAL OPERATION CIRCUIT
Wide input range: 2.75 V to 20 V
Power stage input voltage: 1 V to 20 V
R RAMP1
V IN
Output voltage range: 0.6 V up to 90% V IN
RAMP1
VIN
DH1
BST1
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
ADP1876
EN1
EN2
VDL
SW1
ILIM1
VCCO FB1
M1
L1
R11
V OUT1
±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
3V to 5V INPUT
1.5V
TRK1
PGOOD1
PGOOD2
VINLDO
VOUTLDO
NC
COMP1
COMP2
SS1
SS2
DL1
PGND1
RAMP2
DH2
BST2
SW2
ILIM2
FB2
DL2
R CSG1
R RAMP2
R CSG2
M2
M3
M4
R12
V IN
L2
R21
R22
V OUT2
Consumer applications
Telecommunications base station and networking
Industrial and instrumentation
GENERAL DESCRIPTION
AGND
PGND2
Figure 1.
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
Rev. A
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
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.
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.
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