Datasheet ADP5072 (Analog Devices)

1 A/0.6 A DC to DC Switching Regulator with Independent Positive and Negative Outputs Data Sheet ADP5072 FEATURES TYPICAL APPLICATION CIRCUIT Input supply voltage range: 2.85 V to 5.5 V VIN Generates well regulated, independently resistor ADP5072 L1 programmable V SS POS and VNEG outputs R V C1 POS Boost regulator to generate V SW1 COMP1 POS output C SW1 D1 C1 Adjustable positive output to 35 V R EN1 FT1 FB1 Integrated 1.0 A main switch RFB1 COUT1 Inverting regulator to generate V PVIN NEG output VIN PVIN Adjustable negative output to −30 V PGND C AVIN IN PGND C Integrated 0.6 A main switch VREF VREF 1.2 MHz/2.4 MHz switching frequency with optional external EN2 R C FB2 OUT2 frequency synchronization from 1.0 MHz to 2.6 MHz RC2 COMP2 FB2 Resistor programmable soft start timer C RFT2 C2 Slew rate control for lower system noise SYNC SW2 SLEW V Individual precision enable and flexible start-up sequence D2 NEG SEQ AGND L2 control for symmetric start, V
001
POS first, or VNEG first Out of phase operation
12069-
UVLO, OCP, OVP, and TSD protection
Figure 1.
1.61 mm × 2.18 mm, 20-ball WLCSP −40°C to +125°C junction temperature range APPLICATIONS Bipolar amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and multiplexers Charge coupled device (CCD) bias supplies Optical module supplies RF power amplifier bias Time of flight module supplies GENERAL DESCRIPTION
The ADP5072 is a dual, high performance dc-to-dc regulator that Other key safety features in the ADP5072 include overcurrent generates independently regulated positive and negative rails. protection (OCP), overvoltage protection (OVP), thermal The input voltage range of 2.85 V to 5.5 V supports a wide shutdown (TSD), and input undervoltage lockout (UVLO). variety of applications. The integrated main switch in both The ADP5072 is available in a 20-ball WLCSP and is rated for a regulators enables generation of an adjustable positive output −40°C to +125°C junction temperature range. voltage up to 35 V and a negative output voltage down to −30 V.
Table 1. Family Models
The ADP5072 operates at a pin selected 1.2 MHz or 2.4 MHz
Boost Inverter
switching frequency. The ADP5072 can synchronize with an
Model Switch (A) Switch (A) Package
external oscil ator from 1.0 MHz to 2.6 MHz to ease noise filtering ADP5070 1.0 0.6 20-lead LFCSP (4 mm× 4 mm) and 20-lead TSSOP in sensitive applications. Both regulators implement programma- ADP5071 2.0 1.2 20-lead LFCSP (4 mm × 4 mm) and ble slew rate control circuitry for the MOSFET driver stage to 20-lead TSSOP reduce electromagnetic interference (EMI). Flexible start-up ADP5072 1.0 0.6 20-bal WLCSP (1.61 mm × 2.18 mm) sequencing is provided with the options of manual enable, ADP5073 N/A 1.2 16-lead LFCSP (3 mm × 3 mm) simultaneous mode, positive supply first, and negative supply first. ADP5074 N/A 2.4 16-lead LFCSP (3 mm × 3 mm) ADP5075 N/A 0.8 12-ball WLCSP (1.61 mm × 2.18 mm) The ADP5072 includes a fixed internal or resistor programmable soft start timer to prevent inrush current at power-up.
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Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION PWM MODE PSM MODE UNDERVOLTAGE LOCKOUT (UVLO) OSCILLATOR AND SYNCHRONIZATION INTERNAL REGULATOR PRECISION ENABLING SOFT START SLEW RATE CONTROL CURRENT-LIMIT PROTECTION OVERVOLTAGE PROTECTION THERMAL SHUTDOWN START-UP SEQUENCE APPLICATIONS INFORMATION COMPONENT SELECTION Feedback Resistors OUTPUT CAPACITORS Input Capacitor VREF Capacitor Soft Start Resistor Diodes Inductor Selection for the Boost Regulator Inductor Selection for the Inverting Regulator LOOP COMPENSATION Boost Regulator Inverting Regulator COMMON APPLICATIONS LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE