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SP6122 Datasheet Preview

SP6122 Datasheet

Low Voltage / Micro 8 / PFET / Buck Controller Ideal for 1A to 5A / Small Footprint / DC-DC Power Converters

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® 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
VCC 1
FFLAG 2
VOUT 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 ISET
5 ISENSE
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
5C2
100µF
VCC
FFLAG
VOUT
PDRV
®
GND
SP6122
ISET
ENABLE
ISENSE
3.0V to 7.0V
VIN
RSET
1k
Q1
PDS6375
STPS2L25U
L1
2.2µH
DFLY
1A to 5A
VOUT
COUT
470µF
Rev. 7/16/03
SP6122 Low Voltage, Micro 8, PFET, Buck Controller
1
© Copyright 2003 Sipex Corporation




Sipex

SP6122 Datasheet Preview

SP6122 Datasheet

Low Voltage / Micro 8 / PFET / Buck Controller Ideal for 1A to 5A / Small Footprint / DC-DC Power Converters

No Preview Available !

These are stress ratings only and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect
reliability.
ABSOLUTE MAXIMUM RATINGS
VCC .............................................................................................................. 7V
All other pins ...................................... -0.3V to VCC+0.3V
Peak Output Current < 10µs
PDRV ......................................................................... 2A
Storage Temperature .............................. -65°C to 150°C
Power Dissipation
Lead Temperature (Soldering, 10 sec) ................. 300°C
ESD Rating ...................................................... 2kV HBM
ELECTRICAL CHARACTERISTICS
Unless otherwise specified: 0°C < TAMB < 70°C, 3.0V < VCC < 5.5V, CPDRV = 1nF, VENABLE = VCC, VFFLAG = VCC,
ISET = ISENSE = VCC, GND = 0V
PARAMETER
MIN TYP MAX UNITS CONDITIONS
QUIESCENT CURRENT
VCC Supply Current,
OVC Enabled
VCC Supply Current,
OVC Disabled
VCC Supply Current,
OVC Disabled, Ultra Low IQ
VCC Supply Current, Sleep Mode
-
-
-
-
300 450
250 360
150 225
5 15
REFERENCE
Output Voltage, Initial Accuracy VR*0.985 VR VR*1.015
µA
µA
µA
µA
V
Output Voltage, Over Line,
Load and Temperature
Reference Comparator
Hysteresis
VOUT Input Current
VR*0.980 VR VR*1.020 V
- 5 - mV
- 23 - µA
No Switching, ISET = ISENSE = VCC
No Switching, ISET = ISENSE = 0
No Switching, ISET = 0,
ISENSE=VCC
Enable=0
VR = Factory Set Voltage,
see Note
VR = Factory Set Voltage,
see Note
Internal Hysteresis at Feedback
Terminal
VOUT = VR;
SP6122ACU-1.5 ONLY
OSCILLATOR
Oscillator Frequency
Minimum Pulse Width during
Startup (Blanking Time)
210 300 390 kHz
150 270 380
ns
Soft Start
Soft Start Ramp Time
Soft Start Voltage when
PDRV Switches
- 3.5 - ms VOUT = VR – 30mV, Measure
time from ENABLE = 1V to
PDRV Low
- 250 - mV Measure VSoft Start when
PDRV goes Low. (internal)
Rev. 7/16/03
SP6122 Low Voltage, Micro 8, PFET, Buck Controller
2
© Copyright 2003 Sipex Corporation


Part Number SP6122
Description Low Voltage / Micro 8 / PFET / Buck Controller Ideal for 1A to 5A / Small Footprint / DC-DC Power Converters
Maker Sipex
Total Page 19 Pages
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