FAN5361
6 MHz, 600 mA / 750 mA Synchronous Buck Regulator
Description
Features
The FAN5361 is a 600 mA or 750 mA, step-dow n, sw itching
voltage regulator that delivers a fixed output from a 2.3 V to
5.5 V input voltage supply. Using a proprietary architecture
w ith synchronous rectification, the FAN5361 is capable of
6 MHz Fixed-Frequency Operation
35 µA Typical Quiescent Current
Best-in-Class Load Transient Response
Best-in-Class Efficiency
delivering
a peak efficiency of 92%, w hile maintaining
600 mA or 750 mA Output Current Capability
2.3 V to 5.5 V Input Voltage Range
1.0 to 1.90 V Fixed Output Voltage
Low Ripple Light-Load PFM Mode
Forced PWM and External Clock Synchronization
Internal Soft-Start
efficiency over 80% at load currents as low as 1 mA.
The regulator operates at a nominal fixed frequency of
6 MHz, w hich reduces the value of the external components
to 470 nH for the output inductor and 4.7 µF for the output
capacitor. The PWM modulator can be synchronized to an
external frequency source.
Input Under-Voltage Lockout (UVLO)
Thermal Shutdow n and Overload Protection
6-bump WLCSP, 0.4 mm Pitch
At moderate and light loads, pulse frequency modulation is
used to operate the device in pow er-save mode w ith a
typical quiescent current of 35 µA. Even w ith such a low
quiescent current, the part exhibits excellent transient
response during large load sw ings. At higher loads, the
system automatically sw itches to fixed-frequency control,
operating at 6 MHz. In shutdow n mode, the supply current
drops below 1 µA, reducing pow er consumption. For
applications that require minimum ripple or fixed frequency,
PFM mode can be disabled using the MODE pin.
6-pin 2 x 2 mm UMLP
Applications
Cell Phones, Smart Phones
Tablets, Netbooks®, Ultra-Mobile PCs
3G, LTE, WiMAX™, WiBro®, and WiFi® Data Cards
Gaming Devices, Digital CamerasDC/DC Micro Modules
The FAN5361 is available in 6-bump, 0.4 mm pitch, Wafer-
Level Chip-Scale Package (WLCSP) and a 6-lead 2 x 2 mm
ultra-thin MLP package (UMLP).
Typical Applications
GND
EN
FB
MODE
SW
VIN
EN
1
2
3
6
5
4
A1 A2
B1 B2
C1 C2
COUT
L1
L1
4.7F
CIN
2.2F
SW
CIN
2.2F
(AGND)
470nH
470nH
FB
GND
VIN
MODE
COUT
4.7F
Figure 1. Typical Applications
All trademarks are the property of their respective owners.
© 2008 Semiconductor Components Industries, LLC.
October-2017, Rev. 2
Publication Order Number:
FAN5361/D