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Numéro de référence | ADP5074 | ||
Description | DC-to-DC Inverting Regulator | ||
Fabricant | Analog Devices | ||
Logo | |||
1 Page
Data Sheet
2.4 A, DC-to-DC Inverting Regulator
ADP5074
FEATURES
Wide input voltage range: 2.85 V to 15 V
Adjustable negative output to VIN − 39 V
Integrated 2.4 A main switch
1.2 MHz/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
Precision enable control
Power-good output
UVLO, OCP, OVP, and TSD protection
3 mm × 3 mm, 16-lead LFCSP
−40°C to +125°C junction temperature
Supported by the ADIsimPower tool set
APPLICATIONS
Bipolar amplifiers, ADCs, digital-to-analog converters
(DACs), and multiplexers
High speed converters
Radio frequency (RF) power amplifier (PA) bias
Optical modules
GENERAL DESCRIPTION
The ADP5074 is a high performance dc-to-dc inverting regulator
used to generate negative supply rails.
The input voltage range of 2.85 V to 15 V supports a wide variety of
applications. The integrated main switch enables the generation of
an adjustable negative output voltage down to 39 V below the
input voltage.
The ADP5074 operates at a pin selected 1.2 MHz/2.4 MHz
switching frequency. The ADP5074 can synchronize with an
external oscillator from 1.0 MHz to 2.6 MHz to ease noise
filtering in sensitive applications. The regulator implements
programmable slew rate control circuitry for the MOSFET
driver stage to reduce electromagnetic interference (EMI).
The ADP5074 includes a fixed internal or resistor programmable
soft start timer to prevent inrush current at power-up. During
shutdown, the regulator completely disconnects the load from the
input supply to provide a true shutdown. A power good pin is
available to indicate the output is stable.
TYPICAL APPLICATION CIRCUIT
VIN
CIN
ON
OFF
CVREG
AVIN
PVIN
VREF
ADP5074 FB
EN
VREG
SW
SS
PWRGD
PWRGD
SLEW
CVREF
RFB
RFT
D1
L1
VOUT
COUT
COMP SYNC/FREQ
CC RC
GND
Figure 1.
Other key safety features in the ADP5074 include overcurrent
protection (OCP), overvoltage protection (OVP), thermal
shutdown (TSD), and input undervoltage lockout (UVLO).
The ADP5074 is available in a 16-lead LFCSP and is rated for a
−40°C to +125°C operating junction temperature range.
Table 1. Related Devices
Device
Boost
Inverter
Switch (A) Switch (A)
ADP5070 1.0
0.6
ADP5071 2.0
1.2
ADP5073
ADP5074
ADP5075
Not
applicable
Not
applicable
Not
applicable
1.2
2.4
0.8
Package
20-lead LFCSP (4 mm ×
4 mm) and TSSOP
20-lead LFCSP (4 mm ×
4 mm) and TSSOP
16-lead LFCSP (3 mm ×
3 mm)
16-lead LFCSP (3 mm ×
3 mm)
12-ball WLCSP
(1.61 mm × 2.18 mm)
Rev. 0
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Tel: 781.329.4700
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Technical Support
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Pages | Pages 17 | ||
Télécharger | [ ADP5074 ] |
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