SGM6230 [SGMICRO]
2A, 38V, 385kHz Buck Converter;型号: | SGM6230 |
厂家: | Shengbang Microelectronics Co, Ltd |
描述: | 2A, 38V, 385kHz Buck Converter |
文件: | 总10页 (文件大小:569K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
SGM6230
2A, 38V, 385kHz Buck Converter
GENERAL DESCRIPTION
FEATURES
● 4.5V to 38V Input Voltage Range
● 0.8V to 32V Adjustable Output Voltage Range
● 2A Output Current
The SGM6230 is a current-mode buck converter with
an internal power MOSFET switch. This device has a
fixed switching frequency of 385kHz. It can efficiently
provide up to 2A output load current over a wide input
supply range from 4.5V to 38V with good load and line
regulation responses.
● 94% Peak Efficiency
● Shutdown Supply Current: 18µA (MAX)
● 100mΩ Internal Power MOSFET Switch
● 385kHz Fixed Switching Frequency
● Cycle-by-Cycle Current Limit Protection
● Thermal Shutdown Protection
In addition, the SGM6230 is highly efficient with peak
efficiency at 94% when in operation. The shutdown
supply current consumed by the regulator is less than
18µA. Protection features include cycle-by-cycle
current limit and thermal shutdown. The device also
includes an internal soft-start and an external
adjustable soft-start function to limit the inrush current
and prevent the overshoot of output voltage.
● Under-Voltage Lockout
● Support Low ESR Ceramic Capacitors
● -40℃ to +85℃ Operating Temperature Range
● Available in a Green SOIC-8 (Exposed Pad) Package
APPLICATIONS
The SGM6230 is available in Green SOIC-8 (Exposed
Pad) package and also minimizes the external
components of the device to complete a 2A buck
DC/DC converter solution.
Battery Chargers
Flat Panel TVs
Set-Top Boxes
Cigarette Lighter Powered Devices
Pre-Regulators
TYPICAL APPLICATION
R4
C5
10Ω or shorted 10nF
INPUT
4.5V to 38V
L
IN
BS
10μH
OUTPUT
3.3V/2A
ENABLE
EN
SW
SGM6230
R1
33kΩ
SS
FB
GND
COMP
R2
10.5kΩ
COUT
47μF
CIN
22μF
ceramic cap
C3
5.6nF
R3
6.49kΩ
D1
B340A
C4
0.1μF
C6
optional
recommended
Figure 1. Typical Application Circuit
SG Micro Corp
www.sg-micro.com
JULY 2015–REV. A.2
SGM6230
2A, 38V, 385kHz Buck Converter
PACKAGE/ORDERING INFORMATION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
SGM
6230YPS8
XXXXX
SOIC-8
(Exposed Pad)
SGM6230
-40°C to +85°C
SGM6230YPS8G/TR
Tape and Reel, 2500
MARKING INFORMATION
NOTE: XXXXX = Date Code and Vendor Code.
X X X X X
Vendor Code
Date Code - Week
Date Code - Year
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
OVERSTRESS CAUTION
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed in Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods
may affect reliability. Functional operation of the device at any
conditions beyond those indicated in the Recommended
Operating Conditions section is not implied.
Supply Voltage VIN............................................. -0.3V to 40V
SW Voltage VSW........................................-0.5V to VIN + 0.3V
Boost Voltage VBS..............................VSW - 0.3V to VSW + 6V
All Other Pins....................................................... -0.3V to 6V
Package Thermal Resistance
SOIC-8 (Exposed Pad), θJA ....................................... 50℃/W
Junction Temperature.................................................+150℃
Storage Temperature Range.......................-65℃ to +150℃
Lead Temperature (Soldering, 10s)............................+260℃
ESD Susceptibility
ESD SENSITIVITY CAUTION
This integrated circuit can be damaged by ESD if you don’t
pay attention to ESD protection. SGMICRO recommends that
all integrated circuits be handled with appropriate precautions.
Failureto observe proper handlingand installation procedures
can cause damage. ESD damage can range from subtle
performance degradation tocomplete device failure. Precision
integrated circuits may be more susceptible to damage
because very small parametric changes could cause the
device not to meet its published specifications.
HBM.............................................................................4000V
MM.................................................................................200V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range............................................4.5V to 38V
Operating Temperature Range...................... -40°C to +85°C
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
SG Micro Corp
www.sg-micro.com
JULY 2015
2
SGM6230
2A, 38V, 385kHz Buck Converter
PIN CONFIGURATION
(TOP VIEW)
1
2
3
8
7
6
BS
IN
SS
EN
SW
GND
COMP
FB
4
5
SOIC-8 (Exposed Pad)
PIN DESCRIPTION
PIN
1
NAME
BS
FUNCTION
High-side Gate Drive Boost Input. A 10Ω resistor placed between SW and BS cap is strongly
recommended to reduce SW spike voltage.
Power Input. This pin powers the device and step-down converter switches. A large enough capacitor is
used to bypass this pin to GND to eliminate input’s noise.
2
IN
3
SW
Power Switching Output. Place a capacitor between SW and BS to supply the high-side switch.
Ground. (Exposed pad is connected to the backside of GND)
4
GND
FB
5
Feedback Input. Connect to the resistor divider between output and ground to set output voltage.
Compensation Node for regulation control loop compensation. An additional capacitor between COMP
and GND may be needed.
6
COMP
EN
Enable Input for regulator’s turn-on or turn-off. Drive EN high to turn on the regulator, and drive EN low
to turn it off. Output voltage is discharged when the IC is off. EN is disconnected in automatic startup.
7
Soft-Start Control Input. A capacitor is placed between SS and GND to set the soft-start period.
Disconnect the SS to disable the soft-start function.
8
SS
Exposed
Pad
GND
Power Ground Exposed Pad. Must be connected to GND plane.
SG Micro Corp
JULY 2015
www.sg-micro.com
3
SGM6230
2A, 38V, 385kHz Buck Converter
ELECTRICAL CHARACTERISTICS
(VIN = 12V, TA = +25℃, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
4.5
TYP
MAX
38
UNITS
V
Input Voltage Range
VIN
Feedback Voltage
VFB
0.776
0.8
10
0.824
18
V
Shutdown Supply Current
Quiescent Supply Current
High-side Switch (M1) On-Resistance
Low-side Switch (M2) On-Resistance
Error Amplifier Transconductance
Error Amplifier Voltage Gain
SW Leakage Current
ISHDN
IQ
VEN = 0V
μA
mA
mΩ
Ω
VEN = 2.6V, VFB = 1V
0.8
1.7
RONH
RONL
GEA
100
10
∆VFB = ±12.5mV
500
800
10000
1120
1
μA/V
V/V
μA
A
AEA
ILSW
VEN = 0V, VSW = 0V
Current Limit
ILIM
4.2
6.2
Current Sense to COMP
Transconductance
GCS
A/V
Maximum Duty Cycle
DMAX
DMIN
VIH
VFB = 0.6V
VFB = 1V
90
0
%
%
Minimum Duty Cycle
EN Threshold Voltage
EN Threshold Voltage
EN Pull-Up Current
1.2
V
VIL
0.4
2
V
VEN = 0V
0.8
335
25
1.4
385
38
μA
kHz
kHz
V
Oscillator Frequency
fS
435
60
Short-Circuit Oscillator Frequency
Under-Voltage Lockout Threshold
VFB = 0V
VIN Rising
3.5
3.8
4.2
Under-Voltage Lockout Threshold
Hysteresis
230
mV
Soft-Start Period
CSS = 0.1μF
10
ms
Thermal Shutdown Temperature
TSHDN
160
℃
SG Micro Corp
www.sg-micro.com
JULY 2015
4
SGM6230
2A, 38V, 385kHz Buck Converter
TYPICAL PERFORMANCE CHARACTERISTICS
VIN = 12V, CIN = 22µF, COUT = 47µF and TA = +25°C, unless otherwise noted.
Switching Waveforms
Load Transient Response
IL
VOUT
VOUT
VIN
IL
VSW
VIN = 12V, VOUT = 3.3V, 1A to 2A Step
VIN = 12V, VOUT = 3.3V, RLOAD = 2Ω
Time (2μs/div)
Time (200μs/div)
Soft-Start Waveforms
Turn-Off Waveforms
VOUT
VOUT
IL
IL
VIN = 12V, VOUT = 3.3V, RLOAD = 2Ω
VIN = 12V, VOUT = 3.3V, RLOAD = 2Ω
Time (4ms/div)
Time (100μs/div)
Efficiency vs. Load Current
Efficiency vs. Load Current
VIN = 9V
100
90
80
70
60
50
40
30
100
90
80
70
60
50
40
30
VIN = 5V
VIN = 12V
VIN = 12V
VIN = 24V
VIN = 24V
VOUT = 3.3V
L = 10μH
VOUT = 5V
L = 10μH
0
0.5
1
1.5
2
2.5
3
3.5
0
0.5
1
1.5
2
2.5
3
3.5
Load Current (A)
Load Current (A)
SG Micro Corp
www.sg-micro.com
JULY 2015
5
SGM6230
2A, 38V, 385kHz Buck Converter
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 12V, CIN = 22µF, COUT = 47µF and TA = +25°C, unless otherwise noted.
Efficiency vs. Load Current
Efficiency vs. Load Current
100
90
80
70
60
50
40
30
100
90
80
70
60
50
40
30
VOUT = 5V
VOUT = 3.3V
VIN = 36V
VIN = 36V
0
0.5
1
1.5
2
2.5
3
3.5
100
100
0
0.5
1
1.5
2
2.5
3
3.5
Load Current (A)
Load Current (A)
Feedback Voltage vs. Temperature
Oscillator Frequency vs. Temperature
0.83
0.82
0.81
0.80
0.79
0.78
0.77
420
400
380
360
340
320
-50
-25
0
25
50
75
-50
-25
0
25
50
75
100
Temperature (℃)
Temperature (℃)
Peak Current Limit vs. Temperature
4.5
4.3
4.1
3.9
3.7
3.5
-50
-25
0
25
50
75
Temperature (℃)
SG Micro Corp
www.sg-micro.com
JULY 2015
6
SGM6230
2A, 38V, 385kHz Buck Converter
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
JULY 2015 ‒ REV.A.1 to REV.A.2
Page
Changed Typical Application and Input Capacitor............................................................................................................................................1, 8
JULY 2014 ‒ REV.A to REV.A.1
Page
Added a 10Ω resistor between SW and BS pin in application circuit.......................................................................................................... 1, 3, 10
Changes from Original (APRIL 2014) to REV.A
Page
Changed from product preview to production data.............................................................................................................................................All
SG Micro Corp
www.sg-micro.com
JULY 2015
7
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
SOIC-8 (Exposed Pad)
3.302
D
e
E1
E
2.413 5.56
E2
1.91
b
D1
1.27
0.61
RECOMMENDED LAND PATTERN (Unit: mm)
L
A
A1
c
θ
A2
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
MIN
MAX
0.067
0.004
0.061
0.020
0.010
0.201
0.134
0.157
0.244
0.099
A
A1
A2
b
1.700
0.100
1.550
0.510
0.250
5.100
3.402
4.000
6.200
2.513
0.000
1.350
0.330
0.170
4.700
3.202
3.800
5.800
2.313
0.000
0.053
0.013
0.007
0.185
0.126
0.150
0.228
0.091
c
D
D1
E
E1
E2
e
1.27 BSC
0.050 BSC
L
0.400
0°
1.270
8°
0.016
0°
0.050
8°
θ
SG Micro Corp
www.sg-micro.com
TX00013.000
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
P0
W
Q2
Q4
Q2
Q4
Q2
Q4
Q1
Q3
Q1
Q3
Q1
Q3
B0
Reel Diameter
P1
A0
K0
Reel Width (W1)
DIRECTION OF FEED
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Reel Width
Reel
Diameter
A0
B0
K0
P0
P1
P2
W
Pin1
Package Type
W1
(mm)
(mm) (mm) (mm) (mm) (mm) (mm) (mm) Quadrant
SOIC-8
(Exposed Pad)
13″
12.4
6.40
5.40
2.10
4.0
8.0
2.0
12.0
Q1
SG Micro Corp
TX10000.000
www.sg-micro.com
PACKAGE INFORMATION
CARTON BOX DIMENSIONS
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Length
(mm)
Width
(mm)
Height
(mm)
Reel Type
Pizza/Carton
13″
386
280
370
5
SG Micro Corp
www.sg-micro.com
TX20000.000
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