Document
FAN4603 — 500mA, Fully Integrated Buck Power Supply Module
www.DataSheet4U.com
April 2010
FAN4603 500mA, Fully Integrated, Buck Power Supply Module
Features
Solder and Play DC/DC Converter; No External Components Required Up to 91% Efficiency 500mA Output Current Capability 2.3V to 5.5V Input Voltage Range Fixed Output Voltages from 1.2V to 1.8V 35µA PFM Quiescent Current Best-in-Class Load and Line Transient Response ±4% PWM DC Voltage Accuracy No External Components Required High-Efficiency, Low-Ripple, Light-Load PFM Thermal Shutdown (TSD), Under-Voltage Lockout, (UVLO), and Short-Circuit (SCP) Protection 4.0 x 2.5mm MLP Package Maximum Height: 1.1mm
Description
The FAN4603 is a fully integrated synchronous DC/DC buck converter that provides up to 500mA of output current over an input voltage ranging from 2.3V to 5.5V. It provides a fixed output voltage level ranging from 1.2V to 1.8V. Other voltage options are available on request. The FAN4603 converter is offered as an ultra-miniature “Solder and Play” solution that requires no external components and is able to achieve a DC accuracy of ±4% PWM and an output ripple less than 12mV. Total footprint is 4.0 x 2.5mm with a maximum height of 1mm. It can be used in small battery-powered devices and applications with distributed DC POL requirements. At moderate and light loads, pulse frequency modulation is used to operate the device in power-save mode with a typical quiescent current of 35µA. Even with such a low quiescent current, the part exhibits excellent transient response during large load swings. At higher loads, the system automatically switches to fixed-frequency control. In shutdown mode, the supply current drops below 2µA, reducing power consumption.
Applications
POL and Distributed DC-DC Module Applications Small Form Factor, Battery-Powered Applications POL Core Power for FPGA, DSP, CPU, and GPU with Fast-Transient, Wide Dynamic Load Requirements Wireless Cards, Meters, Hearing Aids, Bluetooth Headsets, POS Equipment, VOIP, PDAs, MIDs, Netbooks, and Servers
Ordering Information
Part Number
FAN4603MM18X FAN4603MM15X FAN4603MM12X Note:
Output Voltage
1.82V 1.5V 1.23V
(1)
Package
6 Lead Molded Leadless Package (MLP), 4 x 2.5 x 1mm 6 Lead Molded Leadless Package (MLP), 4 x 2.5 x 1mm 6 Lead Molded Leadless Package (MLP), 4 x 2.5 x 1mm
Temperature Range
–40 to 85°C –40 to 85°C –40 to 85°C
Packing
Tape and Reel Tape and Reel Tape and Reel
1. Other voltage options are available on request. Contact a Fairchild representative.
© 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.0
www.fairchildsemi.com
www.DataSheet4U.com
FAN4603 — 500mA, Fully Integrated Buck Power Supply Module
Typical Application
Figure 1. Typical Application
Pin Configuration
Figure 2. MLP 4.0 x 2.5 mm (Top View)
Figure 3. 3D Package View
Pin Definitions
Pin #
1 2 3 4 5 6 P1
Name
VIN EN SW VOUT FB GND GND
Description
Input Voltage. Connect to input power source Enable. The device is in shutdown mode when voltage to this pin is <0.4V and enabled when >1.2V. Do not leave this pin floating. Switching Node. Leave this pin floating. Output Voltage. Connect to Load. Feedback/VOUT. This pin must be shorted directly to VOUT (Pin 4). Ground. Power and IC ground. All signals are referenced to this pin. Optional Ground Connection. Not typically used.
© 2009 Fairchild Semiconductor Corporation FAN4603 • Rev. 1.0.0
www.fairchildsemi.com 2
www.DataSheet4U.com
FAN4603 — 500mA, Fully Integrated Buck Power Supply Module
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only.
Symbol
VIN TJ TSTG TL ESD
Parameter
Input Voltage with Respect to GND Voltage on Any Other Pin with Respect to GND Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 Seconds) Electrostatic Discharge Capability Human Body Model JESD22-A114 Charged Device Model, JESD22-C101
Min.
-0.3 -0.3 -40 -65 6 2
Max.
6.0 VIN 150 +150 +260
Units
V V °C °C °C kV
Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings.
Symbol
VCC IOUT TA TJ Supply Voltage Range Output Current
Parameter
Min.
2.3 0 -40 -40
Max.
5.5 500 +85 +125
Units
V mA °C °C
Operating Ambient Temperature Operating Junction Temperature
Thermal Properties
Symbol
ΘJA
Parameter
Junction-to-Ambient Thermal Resistance
(2)
Typical
120
Units
°C/W
Note: 2. Junction-to-.