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Sipex Corporation
Sipex Corporation

SP6138 Datasheet Preview

SP6138 Datasheet

Synchronous Buck Controller

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SP6138 pdf
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SP6138
2.5MHz Synchronous Buck Controller
FEATURES
5V to 24V Input step down converter
Up to 3A output in a small form factor
16 15 14 13
Highly integrated design, minimal components
GL 1
12 GH
UVLO Detects Both VCC and VIN
Overcurrent circuit protection with auto-restart
PGND 2
SP6138
11 SWN
Power Good Output, ENABLE Input
Maximum Controllable Duty Cycle Ratio up to 92%
GND
3
16 Pin QFN
3mm x 3mm
10 ISP
Wide BW amp allows Type II or III compensation VFB 4
9 ISN
Programmable Soft Start
Fast Transient Response
Available in 16-Pin QFN package
5678
External Driver Enable/Disable
U.S. Patent #6,922,041
Now Available in Lead Free Packaging
DESCRIPTION
The SP6138 is a synchronous step-down switching regulator controller optimized for small
footprint. The part is designed to be especially attractive for single supply step down con-
version from 5V to 24V. The SP6138 is designed to drive a pair of external NFETs using a
fixed 2.5 MHz frequency, PWM voltage mode architecture. Protection features include UVLO,
thermal shutdown, output short circuit protection, and overcurrent protection with auto restart.
The device also features a PWRGD output and an enable input. The SP6138 is available in
a space saving 16-pin QFN and offers excellent thermal performance.
TYPICAL APPLICATION CIRCUIT
C5
CVCC
4.7uF
0.1uF
DBST
SD101AWS
VIN
BST
R3 10KΩ
POWERGOOD
ENABLE
NC
VCC
GH
SP6138
PWRGD
SWN
UVIN
EN
GND
GL
CBST
0.1uF
MT/MB, Si7214DN
47 mΩ, 30V
(Co-Packaged FETs)
COOPER, DR73-2R2
2.2uH, 4.15A, 16.5mΩ
RS1
5.11KΩ
RS2
5.11KΩ
CF1
18pF
CZ2
CP1
100pF
PGND
COMP
6 pF
RZ2
54.9KΩ
ISP
ISN
VFB
SS
CSS
47nF
CZ3
47pF
RZ3
1KΩ
CSP
6.8nF
CS 0.1uF
C1
4.7uF
VIN
12V
GND
VOUT
3.3V
@3A
C2
22uF
GND
R1
68.1KΩ, 1%
R2
21.5KΩ, 1%
Note: Die-attach paddle is connected to GND
Date: Sept30-06 Rev L
SP6138 Synchronous Buck Controller
1
© 2006 Sipex Corporation



Sipex Corporation
Sipex Corporation

SP6138 Datasheet Preview

SP6138 Datasheet

Synchronous Buck Controller

No Preview Available !

SP6138 pdf
www.DataSheet4U.com
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 maxi-
mum rating conditions for extended periods of time may affect reliability.
VCC ................................................................................................. 6V
VIN .............................................................................................. 24.5V
BST................................................................................................ 30V
BST-SWN ........................................................................................ 7V
SWN ....................................................................................-2V to 24V
GH ..........................................................................-0.3V to BST+0.3V
GH-SWN.......................................................................................... 6V
ABSOLUTE MAXIMUM RATINGS
Peak Output Current < 10µs
GH,GL ............................................................................................. 2A
Storage Temperature................................................... -65°C to 150°C
Power Dissipation........................................................................... 1W
ESD Rating........................................................................... 2kV HBM
Thermal Resistance ............................................................. 41.9°C/W
All other pins........................................................... -0.3V to VCC+0.3V
ELECTRICAL SPECIFICATIONS
Unless otherwise specified: -40°C < TAMB < 85°C, 4.5V < VCC < 5.5V, BST=VCC, SWN = GND = PGND = 0.0V, UVIN = 3.0V, CVCC
= 10µF, CCOMP = 0.1µF, CGH = CGL = 3.3nF, CSS = 50nF, RPWRGD = 10KΩ.
PARAMETER
QUIESCENT CURRENT
VIN Supply Current
VCC Supply Current
BST Supply Current
PROTECTION: UVLO
VCC UVLO Start Threshold
VCC UVLO Hysteresis
MIN
4.00
150
UVIN Start Threshold
2.35
TYP
1.5
1.5
0.2
4.25
200
2.50
UVIN Hysteresis
200 300
VIN Start Threshold
9.0 9.5
VIN Hysteresis
300
Enable Pullup Current
0.4
ERROR AMPLIFIER REFERENCE
Error Amplifier Reference 0.792 0.800
Error Amplifier Reference
Over Line and Temperature
0.788
0.800
COMP Sink Current
70 150
COMP Source Current
-230 -150
VFB Input Bias Current
1 50
COMP Common Mode
Output Range
1.9 3.0
COMP Pin Clamp Voltage 3.2 3.5
MAX
3.0
3.0
0.4
4.5
250
2.65
400
10.0
0.808
0.812
230
-70
100
3.2
3.8
UNITS CONDITIONS
mA VFB = 1V (no switching)
mA VFB = 1V (no switching)
mA VFB = 1V (no switching)
V
mV
V
Apply voltage to UVIN
pin
mV
Apply voltage to UVIN
pin
V UVIN Floating
mV UVIN Floating
µA Apply voltage to EN pin
V 2X Gain Config.
V
µA
µA
nA
V
V VFB = 0.7V
Date: Sept30-06 Rev L
SP6138 Synchronous Buck Controller
2
© 2006 Sipex Corporation


Part Number SP6138
Description Synchronous Buck Controller
Maker Sipex Corporation
Total Page 17 Pages
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