SP6134H Datasheet, PDF (1/15 Pages) Sipex Corporation – High Voltage, 600 KHz Synchronous PWM Controller

January 2009
SP6134H
High Voltage, 600kHz Synchronous PWM Step Down
Controller
Rev. 2.0.0
GENERAL DESCRIPTION
The SP6134H is a 600kHz constant frequency,
voltage mode, synchronous PWM step down
controller optimized for high efficiency.
The SP6134H is adequately suited for split
plane applications utilizing a low power 5V rail
to power the controller circuitry, minimizing
power dissipation. Its wide input voltage range
of 3V to 15V allows for conversions from the
standard 3.3V, 5V, 9.6V and 12V power rails
to an output voltage adjustable down to 0.8V.
Developed around a wide bandwidth internal
amplifier, the SP6134H can accommodate type
II and type III compensation schemes.
Protection features include a programmable
UVLO, thermal shutdown and output short
circuit protection.
The SP6134H is part of a larger family of step
down controllers operating at various
switching frequencies up to 1300kHz and input
voltages up to 28V. Refer to Exar’s SP6134,
SP6132, SP6132H, SP6137 and SP6139 for
complete details.
The SP6134H is available in lead free, RoHS
compliant, space saving 10-pin MSOP
package.
APPLICATIONS
• Wireless Base Station
• Automotive
• Industrial
• Power Supply
FEATURES
• 3V to 28V Step Down Achieved Using
Dual Input
• On-Board 1.5Ω sink (2Ω source) NFET
Drivers
• Up to 15A Output Capability
• UVLO Detects Both VCC and VIN
• Short-Circuit Protection with Auto-
Restart
• Supports Type II or III Compensation
• Programmable Soft Start
• Fast Transient Response
• High Efficiency: Greater than 94%
• Non-synchronous Start-Up
• Small 10-Pin MSOP Package
• U.S. Patent #6,922,041
TYPICAL APPLICATION DIAGRAM
V_CC = 5V @ 30mA
RLF
3.0,5%
R3
221k, 1%
UV_IN
R4
100k, 1%
DBST
MBR0530
C_VCC
10μF
6.3V
GND 3
0.8V
C_VCC
Ceramic
8050
X5R
CF1
100pF
U1
SP6134H
1 _VCC
BST ¹⁰
2 _GL
GH ⁹
3 _GND
SWN ⁸
4 _VFB
SS ⁷
5 _{COMP UVIN} 6
CZ2 RZ2
820pF 40.2k, 1%
CP1
56pF
fs=600Khz
8765
QT
FDS6676S
4
14.5A, 6mΩ
123
CBST
1μF
R5
Bead
8765
QB
4
SS
123
FDS6676S
CSS ^{14.5A, 6.0mΩ}
47nF
VOUT=(R1/R2 +1)VFB
C1
22μF
16V
C2
22μF
16V
C1, C2
Ceramic
1210
X5R
VIN
3.5V - 15V
GND
C3
47μF
6.3V
C4
47μF
6.3V
RZ3
4.64k, 1%
CZ3
220pF
V_OUT≤VIN
0.8V - 3.3V
0 - 10 A
R1
68.1k, 1%
GND2
C3, C4
Ceramic
1210
X5R
R2
21.5k, 1%
Fig. 1: SP6134H Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. [phone] – Fax. [phone]