SP7652 반도체 회로 부품 판매점
Wide Input Voltage Range 6A / 600kHz / Buck Regulator
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 Sipex |
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Preliminary
SP7652
Wide Input Voltage Range 6A, 600kHz, Buck Regulator
FEATURES
■ 2.5V to 28V Step Down Achieved Using Dual Input
■ Output Voltage down to 0.8V
■ 6A Output Capability (Up to 8A with Air Flow)
■ Built in Low RDSON Power FETs (15 mΩ typ)
■ Highly Integrated Design, Minimal Components
■ 600 kHz Fixed Frequency Operation
■ UVLO Detects Both VCC and VIN
■ Over Temperature Protection
■ Short Circuit Protection with Auto-Restart
■ Wide BW Amp Allows Type II or III Compensation
■ Programmable Soft Start
■ Fast Transient Response
■ High Efficiency: Greater than 92% Possible
■ Asynchronous Start-Up into a Pre-Charged Output
■ Small 7mm x 4mm DFN Package
PGND 1
PGND 2
PGND 3
GND 4
VFB 5
COMP 6
UVIN 7
GND 8
SS 9
VIN 10
VIN 11
VIN 12
VIN 13
SP7652
DFN PACKAGE
7mm x 4mm
TOP VIEW
Heatsink Pad 1
Connect to Lx
Heatsink pad 2
Connect to GND
Heatsink pad 3
Connect to VIN
26 LX
25 LX
24 LX
23 LX
2 2 VCC
21 GND
20 GND
19 GND
18 BST
17 NC
16 LX
15 LX
14 LX
Now Available in Lead Free Packaging
DESCRIPTION
The SP7652 is a synchronous step-down switching regulator optimized for high efficiency. The part is designed to be
especially attractive for dual supply, 12V step down with 5V used to power the controller. This lower VCC voltage
minimizes power dissipation in the part. The SP7652 is designed to provide a fully integrated buck regulator solution
using a fixed 600kHz frequency, PWM voltage mode architecture. Protection features include UVLO, thermal shutdown
and output short circuit protection. The SP7652 is available in the space saving DFN package.
TYPICAL APPLICATION CIRCUIT
100pF 5.1K
21.5k,1%
RSET
(note 2)
1nF 12K
22pF
CF1
100pF
ENABLE
VIN
2.5V - 20V
CSS
22nF
C1
22uF
GND
1
PGND
2
PGND
3
PGND
4
GND
5
VFB
6
COMP
7
UVIN
8
GND
9
SS
10
VIN
11
VIN
12
VIN
13
VIN
U1
SP7652
LX
LX
LX
LX
VCC
GND
GND
GND
BST
NC
LX
LX
LX
26
25
24
23
22
21
20
19
18
17
16
15
14
68.1k,1%
1.5uH, Irate=8A
CVCC
1uF
5V VCC
VOUT
3.3V
0-8A
47uF
Ceramic
X5R 6.3V
5.1 SD101AWS
1uF
Notes:
1. U1 Bottom-Side Layout should has
three contacts isolated from one
another VIN and SWNODE and GND
2. RSET = 54.48 / (Vout - 0.8V) (kOhm)
Date: 08/12/04
SP7652 Wide Input Voltage Range 6A, 600kHz, Buck Regulator
1
© Copyright 2004 Sipex Corporation
ABSOLUTE MAXIMUM RATINGS
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.
VCC .................................................................................................. 7V
VIN ........................................................................................................................................... 30V
ILX ............................................................................................................................................ 10A
BST ............................................................................................... 35V
BST-SWN ......................................................................... -0.3V to 7V
SWN ................................................................................... -1V to 30V
GH ......................................................................... -0.3V to BST+0.3V
GH-SWN ......................................................................................... 7V
All other pins .......................................................... -0.3V to VCC+0.3V
Storage Temperature .................................................. -65°C to 150°C
Power Dissipation .................................................... Internally Limited
Lead Temperature (Soldering, 10 sec) ...................................... 300°C
ESD Rating .......................................................................... 2kV HBM
Thermal Resistance ϑJC .................................................................................... 5°C/W
ELECTRICAL SPECIFICATIONS
Unless otherwise specified: -40°C < TAMB < 85°C, -40°C<Tj<125°C, 4.5V < VCC < 5.5V, 3V<Vin<28V, BST=LX + 5V, LX =
GND = 0V, UVIN = 3.0V, CVCC = 1µF, CCOMP = 0.1µF, CSS = 50nF, Typical measured at VCC = 5V.
The ♦ denotes the specifications which apply over the full temperature range, unless otherwise specified.
PARAMETER
MIN. TYP. MAX. UNITS CONDITIONS
QUIESCENT CURRENT
VCC Supply Current (No switching)
VCC Supply Current (switching)
BST Supply Current (No switching)
BST Supply Current (switching)
1.5 3
11 TBD
0.2 0.4
5.0 TBD
mA VFB =0.9V
mA ♦
mA VFB =0.9V
mA ♦
PROTECTION: UVLO
VCC UVLO Start Threshold
VCC UVLO Hysteresis
UVIN Start Threshold
4.00 4.25
4.5
100 200 300
2.3 2.5 2.65
UVIN Hysteresis
200 300 400
UVIN Input Current
1
ERROR AMPLIFIER REFERENCE
Error Amplifier Reference
0.792 0.800 0.808
Error Amplifier Reference
Over Line and Temperature
Error Amplifier Transconductance
Error Amplifier Gain
COMP Sink Current
COMP Source Current
VFB Input Bias Current
Internal Pole
COMP Clamp
COMP Clamp Temp. Coefficient
0.788 0.800 0.812
6
60
150
150
50 200
4
2.5
-2
V
mV
V♦
mV
µA UVIN= 3.0V
V
2X Gain Config., Measure
VFB; VCC =5 V, T=25ºC
V♦
mA/V
dB
µA
µA
nA
MHz
V
mV/ºC
No Load
VFB =0.9V, COMP= 0.9V
VFB =0.7V, COMP= 2..2V
VFB = 0.8V
VFB =0.7V, TA=25ºC
Date: 08/12/04
SP7652 Wide Input Voltage Range 6A, 600kHz, Buck Regulator
2
© Copyright 2004 Sipex Corporation
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( sipex )
SP7652 regulator
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