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
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