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FAN53526 — 3.0 A, 2.4 MHz, Digitally Programmable TinyBuck
®
Regulator
July 2017
FAN53526
3.0 A, 2.4 MHz, Digitally Programmable TinyBuck® Regulator
Features
Fixed-Frequency Operation: 2.4 MHz
Best-in-Class Load Transient
Continuous Output Current Capability: 3.0 A
2.5 V to 5.5 V Input Voltage Range
Digitally Programmable Output Voltage:
- 0.600 V to 1.39375 V in 6.25 mV Steps
Programmable Slew Rate for Voltage Transitions
I
2
C-Compatible Interface Up to 3.4 Mbps
PFM Mode for High Efficiency in Light-Load
Quiescent Current in PFM Mode: 50 µA (Typical)
Input Under-Voltage Lockout (UVLO)
Thermal Shutdown and Overload Protection
15-Bump Wafer-Level Chip Scale Package (WLCSP)
Description
The FAN53526 is a step-down switching voltage regulator
that delivers a digitally programmable output from an input
voltage supply of 2.5 V to 5.5 V. The output voltage is
programmed through an I
2
C interface capable of operating
up to 3.4 MHz.
Using a proprietary architecture with synchronous
rectification, the FAN53526 is capable of delivering 3.0 A
continuous at over 80% efficiency, maintaining that efficiency
at load currents as low as 10 mA. The regulator operates at
a nominal fixed frequency of 2.4 MHz, which reduces the
value of the external components. Additional output
capacitance can be added to improve regulation during load
transients without affecting stability.
At moderate and light loads, Pulse Frequency Modulation
(PFM) is used to operate in Power-Save Mode with a typical
quiescent current of 50 µA at room temperature. 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,
operating at 2.4 MHz. In Shutdown Mode, the supply current
drops below 1 µA, reducing power consumption. PFM Mode
can be disabled if fixed frequency is desired. The FAN53526
is available in a 15-bump, 1.310 mm x 2.015 mm, 0.4 mm
ball pitch WLCSP.
PVIN
EN
SDA
SCL
VSEL
FAN53526
C
IN
VOUT
SW
PGND
AGND
L1
Applications
Application, Graphic, and DSP Processors
-
ARM™, Tegra™, OMAP™, NovaThor™,
ARMADA™, Krait™, etc.
Hard Disk Drives, LPDDR3, LPDDR4
Tablets, Netbooks, Ultra-Mobile PCs
Smart Phones
Gaming Devices
C
BY
C
IN_LOAD
C
OUT
LOAD
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