Datasheet ADP2164 (Analog Devices)

6.5 V, 4 A, High Efficiency, Step-Down, DC-to-DC Regulator Data Sheet ADP2164 FEATURES TYPICAL APPLICATIONS CIRCUIT 4 A continuous output current R1 VIN 43 mΩ and 29 mΩ integrated FET C1 CIN R2 ±1.5% output accuracy Input voltage range: 2.7 V to 6.5 V PGOOD VIN PVIN L Output voltage: 0.6 V to VIN EN SW VOUT Switching frequency COUT SYNC FB Fixed frequency: 600 kHz or 1.2 MHz ADP2164 TRK PGND Adjustable frequency: 500 kHz to 1.4 MHz GND Synchronizable from 500 kHz to 1.4 MHz RT R
001
Selectable synchronize phase shift: 0° or 180° T Current mode architecture
09944- Figure 1.
Precision enable input Power-good output Voltage tracking input 100 Integrated soft start 95 Internal compensation 90 Starts up into a precharged output 85 UVLO, OVP, OCP, and thermal shutdown %) ( 80 Available in 16-lead, 4 mm × 4 mm LFCSP package Supported by ADIsimPower™ design tool NCY 75 E ICI APPLICATIONS F 70 F E 65 Point-of-load conversion 60 Communications and networking equipment VIN = 5V VOUT = 1.2V Industrial and instrumentation 55 fS = 600kHz VOUT = 3.3V Consumer electronics 50 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
002
OUTPUT CURRENT (A)
09944- Figure 2. Efficiency vs. Output Current
GENERAL DESCRIPTION
The ADP2164 is a 4 A, synchronous, step-down, dc-to-dc regulator The ADP2164 integrates a pair of low on-resistance P-channel in a compact 4 mm × 4 mm LFCSP package. The regulator uses a and N-channel internal MOSFETs to maximize efficiency and current mode, constant frequency pulse-width modulation (PWM) minimize external component count. The 100% duty cycle control scheme for excellent stability and transient response. operation al ows low dropout voltage at 4 A output current. The input voltage range of the ADP2164 is 2.7 V to 6.5 V. The The high, 1.2 MHz PWM switching frequency al ows the use of output voltage of the ADP2164 is adjustable from 0.6 V to the smal external components, and the SYNC input enables multiple input voltage (VIN). The ADP2164 is also available in six preset ICs to synchronize out of phase to reduce ripple and eliminate output voltage options: 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V. beat frequencies. Other key features of the ADP2164 include undervoltage lockout (UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.
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Document Outline Features Applications Typical Applications Circuit General Description Revision History Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Functional Block Diagram Theory of Operation Control Scheme Slope Compensation Precision Enable/Shutdown Integrated Soft Start Oscillator and Synchronization Power Good Current Limit and Short-Circuit Protection Overvoltage Protection (OVP) Undervoltage Lockout (UVLO) Thermal Shutdown Applications Information ADIsimPower Design Tool Output Voltage Selection Inductor Selection Output Capacitor Selection Input Capacitor Selection Voltage Tracking Coincident Tracking Ratiometric Tracking Applications Circuits Outline Dimensions Ordering Guide