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ADP5076

更新时间: 2024-11-24 02:48:31
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2 A/1.2 A DC-to-DC Switching Regulator with Independent Positive and Negative Outputs

ADP5076 数据手册

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2 A/1.2 A DC-to-DC Switching Regulator with  
Independent Positive and Negative Outputs  
Data Sheet  
ADP5076  
The ADP5076 includes a fixed internal or resistor programmable  
soft start timer to prevent inrush current at power-up.  
FEATURES  
Input supply voltage range: 2.85 V to 5.5 V  
Generates well regulated, independently resistor  
programmable VPOS and VNEG outputs  
Boost regulator to generate VPOS output  
Adjustable positive output to 35 V  
Other key safety features in the ADP5076 include overcurrent  
protection (OCP), overvoltage protection (OVP), thermal  
shutdown (TSD), and input undervoltage lockout (UVLO).  
The ADP5076 is available in a 20-ball wafer level chip scale  
package (WLCSP) and is rated for a −40°C to +125°C junction  
temperature range.  
Integrated 2.0 A main switch  
Inverting regulator to generate VNEG output  
Adjustable negative output to −30 V  
Integrated 1.20 A main switch  
Table 1. Family Models  
Boost  
Inverter  
1.2 MHz or 2.4 MHz switching frequency with optional  
external frequency synchronization from 1.0 MHz to  
2.6 MHz  
Resistor programmable soft start timer  
Slew rate control for lower system noise  
Individual precision enable and flexible start-up sequence  
control for symmetric start, VPOS first, or VNEG first  
Out of phase operation  
Model  
Switch (A) Switch (A) Package  
ADP5070 1.0  
0.6  
1.2  
0.6  
1.2  
2.4  
0.8  
1.2  
20-lead LFCSP (4 mm ×  
4 mm) and 20-lead TSSOP  
20-lead LFCSP (4 mm ×  
4 mm) and 20-lead TSSOP  
20-ball WLCSP  
(1.61 mm × 2.18 mm)  
16-lead LFCSP (3 mm ×  
3 mm)  
16-lead LFCSP (3 mm ×  
3 mm)  
12-ball WLCSP  
(1.61 mm × 2.18 mm)  
ADP5071 2.0  
ADP5072 1.0  
ADP5073 N/A1  
ADP5074 N/A1  
ADP5075 N/A1  
ADP5076 2.0  
UVLO, OCP, OVP, and TSD protection  
1.61 mm × 2.18 mm, 20-ball WLCSP  
−40°C to +125°C junction temperature range  
APPLICATIONS  
Bipolar amplifiers, ADCs, DACs, and multiplexers  
Charge coupled device (CCD) bias supply  
Optical module supply  
20-ball WLCSP  
(1.61 mm × 2.18 mm)  
1 N/A means not applicable.  
RF power amplifier bias  
Time of flight module supply  
FUNCTIONAL BLOCK DIAGRAM  
V
IN  
GENERAL DESCRIPTION  
ADP5076  
L1  
D1  
SS  
The ADP5076 is a dual, high performance, dc-to-dc regulator that  
generates independently regulated positive and negative rails. The  
input voltage range of 2.85 V to 5.5 V supports a wide variety of  
applications. The integrated main switch in both regulators enables  
generation of an adjustable positive output voltage up to +35 V and  
a negative output voltage down to −30 V.  
V
POS  
R
C1  
SW1  
SW1  
COMP1  
EN1  
C
C1  
R
FT1  
FB1  
R
FB1  
C
OUT1  
OUT2  
PVIN  
PVIN  
AVIN  
V
IN  
PGND  
PGND  
VREF  
C
IN  
C
VREF  
The ADP5076 operates at a pin selected 1.2 MHz or 2.4 MHz  
switching frequency. The ADP5076 can synchronize with an  
external oscillator from 1.0 MHz to 2.6 MHz to ease noise  
filtering in sensitive applications. Both regulators implement  
programmable slew rate control circuitry for the metal-oxide  
semiconductor field effect transistor (MOSFET) driver stage to  
reduce electromagnetic interference (EMI). Flexible start-up  
sequencing is provided with the options of manual enable,  
simultaneous mode, positive supply first, and negative supply first.  
EN2  
C
R
FB2  
R
C2  
FB2  
COMP2  
R
FT2  
C
C2  
SYNC  
SLEW  
SEQ  
SW2  
V
NEG  
D2  
AGND  
L2  
Figure 1.  
Rev. A  
Document Feedback  
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 registeredtrademarks arethe property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Technical Support  
©2019 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 

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