SP6122 Datasheet, PDF (1/19 Pages) Sipex Corporation – Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters

®
SP6122
Low Voltage, Micro 8, PFET, Buck Controller
Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters
FEATURES
■ Optimized for Single Supply, 3V - 5.5V Applications
■ High Efficiency, Greater than 90% Possible
■ Small Micro 8 Package
■ 20ns/1nF PFET Output Driver
■ Fast Transient Response
■ Open Drain Fault Output Pin
■ Internal Soft Start Circuit
■ Accurate 1.5% Reference
■ Programmable Output Voltage or Fixed 1.5V Output
■ Loss-less Adjustable Current Limit with High side
R Sensing
DS(ON)
■ Hiccup or Lock-up Fault Modes
■ Low 5µA Sleep Mode Quiescent Current
■ Low 300µA Protected Mode Quiescent Current
■ Ultra Low, 150µA Unprotected Mode Quiescent
Current
■ High Light Load Efficiency
V_CC 1
FFLAG 2
V_OUT 3
ENABLE 4
SP6122
8 Pin µSOIC
APPLICATIONS
■ Video Cards
■ High Power Portable
■ Microcontrollers
■ I/O & Logic
■ Industrial Control
■ Distributed Power
■ Low Voltage Power
8 PDRV
7 GND
6 I_SET
5 I_SENSE
DESCRIPTION
The SP6122 is a PFM minimum on-time controller designed to work from a single 5V or 3.3V
input supply. It is engineered specifically for size and minimum components count, simplifying
the transition from a linear regulator to a switcher solution. However, unlike other “micro”
parts, the SP6122 has an array of value added features like optional hiccup mode, over
current protection, TTL enable, “jitter and frequency stabilization” and a fault flag pull down
pin. Combined with reference and driver specifications usually found on more expensive
integrated circuits, the SP6122 delivers great performance and value in a micro 8 package.
C1
4.7µF
FFLAG
ENABLE
TYPICAL APPLICATION CIRCUIT
R1
5Ω
C2
100µF
V_CC
FFLAG
V_OUT
PDRV
®
GND
SP6122
I_SET
ENABLE
I_SENSE
3.0V to 7.0V
V_IN
R_SET
1k
Q1
PDS6375
STPS2L25U
L1
2.2µH
DFLY
1A to 5A
V_OUT
C_OUT
470µF
Rev. 7/16/03
SP6122 Low Voltage, Micro 8, PFET, Buck Controller
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© Copyright 2003 Sipex Corporation