Fairchild Fan2001/Fan2002 1A High-Efficiency Step-Down DC-DC Converter Data Manual
Summary
This high-efficiency step-down DC-DC converter delivers up to 1A of regulated power while maintaining low noise and exceptionally high efficiency suitable for battery-powered systems. Designed with synchronous operation and advanced Power Save modes, it features adjustable output voltages from 0.8V to 5.5V and wide input compatibility (2.5V to 5.5V). The accompanying technical manual provides engineers and designers detailed integration guides, key operating parameters, and application examples for building reliable portable electronics, including PDAs, cell phones, digital cameras, and networking gear.
Page 1 Text Content
FA 2001/FA 2002 1A ig -E ffi cien cy S tep -D ow -D nverter
April 2005
FAN2001/FAN2002 1A High-Efficiency Step-Down DC-DC Converter Features Description 96% Efficiency, Synchronous Operation Designed for use in battery-powered applications, the FAN2001/
Adjustable Output Voltage Options from 0.8V to V FAN2002 is a high-efficiency, low-noise synchronous PWM cur-
rent mode and Pulse Skip (Power Save) mode DC-DC con-
2.5V to 5.5V Input Voltage Range
verter. It can provide up to 1A of output current over a wide input
Up to 1A Output Current
range from 2.5V to 5.5V. The output voltage can be externally
Fixed Frequency 1.3MHz PWM Operation adjusted over a wide range of 0.8V to 5.5V by means of an High Efficiency Power Save Mode external voltage divider. 100% Duty Cycle Low Dropout Operation
At moderate and light loads, pulse skipping modulation is used.
Soft Start Dynamic voltage positioning is applied, and the output voltage is
Output Over-Voltage Protection shifted 0.8% above nominal value for increased headroom dur- ing load transients. At higher loads the system automatically
Dynamic Output Voltage Positioning
switches over to current mode PWM control, operating at 1.3
A Quiescent Current
MHz. A current mode control loop with fast transient response
Thermal Shutdown and Short Circuit Protection
ensures excellent line and load regulation. To achieve high effi-
Pb-Free 3x3mm 6-Lead MLP Package ciency and ensure long battery life, the quiescent current is
reduced to 25µA in Power Save mode, and the supply current Applications drops below 1µA in shut-down mode. The FAN2001/FAN2002 is available in a 3x3mm 6-lead MLP package.
Pocket PCs, PDAs Cell Phones Battery-Powered Portable Devices Digital Cameras Hard Disk Drives Set-Top-Boxes Point-of-Load Power Notebook Computers Communications Equipment
Typical Application
VIN SW VOUT
1.2V (1A)1 FB EN
CIN 3.3µH
PGND P1 10KΩ
NC COUT R2
R1 5KΩ PGND VIN
(AGND) P1
FB (AGND)
VOUT L1 PVIN
FAN2001
FAN2002
Figure 1. Typical Application
FAN2001/FAN2002 Rev. 1.0.2 www.fairchildsemi.com ©2005 Fairchild Semiconductor Corporation
Page Summary Contents For Fairchild Fan2001/Fan2002 1A High-Efficiency Step-Down DC-DC Converter Data Manual
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 11 |
| File Size | 329.65 KB |
| Published | July 07, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the typical operating current draw when disabled?
The EN pin requires a logic low signal to keep the supply current below 1µA, though the datasheet states it drops to less than 1µA.
Can I adjust the output voltage of this converter?
Yes, the output voltage can be adjusted from 0.8V to up to 5.5V using an external resistor divider connected to the FB pin.
What is the recommended operating environment for this device?
The device operates across ambient temperatures ranging from -40°C to +85°C, with a junction temperature range of -40°C to +125°C.
Does the converter offer protection features?
Yes, it includes Output Over-Voltage Protection, Thermal Shutdown, and Short Circuit Protection for reliable operation.