www.fairchildsemi.com
FAN5602
Universal (Step-Up/Step-Down) Charge Pump
Regulated DC/DC Converter
Features
鈥?Low Noise Constant Frequency Operation at Heavy Load
鈥?High Ef铿乧iency Pulse-Skip (PFM) Operation at Light
Load
鈥?Adaptive Seven Switch Con铿乬urations (1:3, 1:2, 2:3, 1:1,
3:2, 2:1, 3:1)
鈥?92% Peak Ef铿乧iency
鈥?Input Voltage Range: 2.7V to 5.5V
鈥?Output Current:3.3V, 200mA at V
IN
= 3.6V
鈥?卤3% Output Voltage Accuracy
鈥?I
CC
< 1碌A in Shutdown Mode
鈥?1MHz Operating Frequency
鈥?Shutdown Isolates Output from Input
鈥?Soft-Start Limits Inrush Current at Start-up
鈥?Short Circuit and Over Temperature Protection
鈥?Minimum External Component Count
鈥?No Inductors
Description
The FAN5602 is a universal switched capacitor DC/DC con-
verter capable of step-up or step-down operation. Due to its
unique adaptive fractional switching topology, the device
achieves high ef铿乧iency over a wider input/output voltage
range than any of its predecessors. The FAN5602 utilizes
resistance modulated loop control, which produces lower
switching noise than other topologies. Depending upon
actual load conditions, the device automatically switches
between constant frequency and pulse skipping (PFM)
modes of operation in order to extend battery life. The
FAN5602 produces a 铿亁ed regulated output within the range
of 2.7V to 5.5V from any type of voltage source. High ef铿?
ciency is achieved under any input/output voltage conditions
because an internal logic circuitry automatically recon铿乬ures
the system to the best possible topology. Only two 1碌F
bucket capacitors and one 10碌F output capacitor are needed.
During power on soft start circuitry prevents excessive cur-
rent drawn from the supply. The device is protected against
short circuit and over temperature conditions.
The FAN5602 is available with 3.3V, 4.5V, and 5.0V output
voltage. Any other output voltage option within the 1.5V to
5V range is available upon request. The FAN5602 is avail-
able in 8-lead MSOP and 3x3mm 8-lead MLP packages
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Cell Phones
Handheld Computers
Portable RF Communication Equipment
Core Supply to Low Power Processors
Low Voltage DC Bus
DSP Supplies
Typical Application
Input 2.7V to 5.5V
V
IN
1
C
IN
C
B
C2-
C2+
ENABLE
2
3
4
FAN5602
8
6
7
5
C1+
V
OUT
C
OUT
GND
C1-
REV. 1.1 10/7/04
FAN5602MU33X 产品属性
4,000
集成电路 (IC)
PMIC - 稳压器 - DC DC 开关稳压器
-
降压（降压），升压（升压），切换电容（充电泵）
固定
1
3.3V
1.8 V ~ 5.5 V
-
1MHz
200mA
无
-40°C ~ 85°C
表面贴装
8-MLP
带卷 (TR)
8-MLP（3x3）
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