SGM2534 [SGMICRO]
Simple 5V/12V Load Switch;
| 型号： | SGM2534 |
| 厂家： | 
Shengbang Microelectronics Co, Ltd |
| 描述： | Simple 5V/12V Load Switch |
| 文件： | 总22页 (文件大小：1750K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SGM2533/SGM2534
Simple 5V/12V Load Switches
GENERAL DESCRIPTION
FEATURES
The SGM2533 and SGM2534 are compact, feature rich
eFuses with a full suite of protection functions. The
precision ±15% current limit provides excellent
accuracy and makes the devices well suited for many
system protection applications.
● 5V Electronic Fuse (eFuse): SGM2533A/B
12V Electronic Fuse (eFuse): SGM2534A/B
● RDSON Protection Switch: 27mΩ (TYP)
● Fixed Over-Voltage Clamp:
6.1V Clamp: SGM2533A/B
15V Clamp: SGM2534A/B
There are two over-voltage protection options: 5V
system for SGM2533 and 12V system for SGM2534.
The over-voltage protection (OVP) will clamp the eFuse
output at a fixed level during input voltage surges.
During the input voltage transient, the internal MOSFET
remains on, allowing the load to continue to operate. If
the transient duration remains long, the accumulated
heat will cause the eFuse thermal shutdown. Once in
thermal shutdown, latch-off and auto-retry thermal
options are available.
● Programmable Current Limit: 2A to 5A
(±15% Accuracy)
● Under-Voltage Lockout
● Programmable VOUT Slew Rate
● Thermal Shutdown Protection
Auto-Retry: SGM2533A/SGM2534A
Latch-Off: SGM2533B/SGM2534B
● Available in a Green TDFN-3×3-10L Package
APPLICATIONS
The SGM2533 and SGM2534 are available in a Green
TDFN-3×3-10L package.
Servers and Block Supplies
Motherboard Power Management
PCIE SSD
TYPICAL APPLICATION
Output
OUT
Input
IN
R1
R2
SGM2533/4
COUT
EN/UVLO
ILIM
RILIM
SS
GND
CSS
Figure 1. Typical Application Circuit
SG Micro Corp
SEPTEMBER 2022 – REV. A. 2
www.sg-micro.com
SGM2533
SGM2534
Simple 5V/12V Load Switches
PACKAGE/ORDERING INFORMATION
SPECIFIED
TEMPERATURE
RANGE
PACKAGE
DESCRIPTION
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
MODEL
SGM
2533AD
XXXXX
SGM
2533BD
XXXXX
SGM
2534AD
XXXXX
SGM
2534BD
XXXXX
SGM2533A
SGM2533B
SGM2534A
SGM2534B
SGM2533AXTD10G/TR
Tape and Reel, 4000
Tape and Reel, 4000
Tape and Reel, 4000
Tape and Reel, 4000
TDFN-3×3-10L
TDFN-3×3-10L
TDFN-3×3-10L
TDFN-3×3-10L
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
-40℃ to +125℃
SGM2533BXTD10G/TR
SGM2534AXTD10G/TR
SGM2534BXTD10G/TR
MARKING INFORMATION
NOTE: XXXXX = Date Code, Trace Code and Vendor Code.
X X X X X
Vendor Code
Trace Code
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.
Resistance, RILIM ............................................10kΩ to 162kΩ
External Capacitance
ABSOLUTE MAXIMUM RATINGS
Supply Voltage Range
COUT.......................................................... 0.1μF to 1000μF
VIN ................................................................... -0.3V to 20V
CSS........................................................................< 1000nF
VIN (Transient < 1ms)....................................................22V
Operating Junction Temperature Range ...... -40℃ to +125℃
Output Voltage Range
V
OUT .......................................................-0.3V to VIN + 0.3V
V
OUT (Transient < 1μs) ................................................-1.2V
OVERSTRESS CAUTION
ILIM Voltage......................................................... -0.3V to 7V
SS, EN/UVLO Voltage......................................... -0.3V to 7V
Continuous Output Current, IOUT ...................................6.25A
Package Thermal Resistance
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.
TDFN-3×3-10L, θJA ................................................. 54℃/W
TDFN-3×3-10L, θJB ................................................. 20℃/W
TDFN-3×3-10L, θJC ................................................. 56℃/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 if ESD protections are
not considered carefully. 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 even small parametric changes could cause the
device not to meet the published specifications.
HBM.............................................................................4000V
CDM ............................................................................1000V
RECOMMENDED OPERATING CONDITIONS
Supply Voltage Range
V
V
IN (SGM2533).................................................4.5V to 5.5V
IN (SGM2534)...............................................4.5V to 13.8V
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
SS, EN/UVLO Voltage..............................................0V to 6V
ILIM Voltage..............................................................0V to 3V
Continuous Output Current, IOUT ...............................0A to 5A
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
2
SGM2533
SGM2534
Simple 5V/12V Load Switches
PIN CONFIGURATION
(TOP VIEW)
SS
1
2
3
4
5
10 ILIM
EN/UVLO
9
8
7
6
NC
IN
IN
IN
OUT
OUT
OUT
GND
TDFN-3×3-10L
PIN DESCRIPTION
PIN
NAME
SS
FUNCTION
Soft-Start Pin. The capacitor between SS and GND pins will set the slew rate according to the
application requirements.
1
Enable Input or Under-Voltage Lockout. Asserting EN/UVLO pin high enables the device. As an
UVLO pin, the UVLO threshold is programmed by an external resistor divider.
2
3, 4, 5
6, 7, 8
9
EN/UVLO
IN
Power Input Pin. Power input and supply voltage of the device.
OUT
NC
Power Output Pin.
No Connection.
Current Limit Programming Pin. A resistor between this pin and GND sets the overload and
short-circuit current limit levels.
10
ILIM
Exposed Pad
GND
Ground.
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
3
SGM2533
SGM2534
Simple 5V/12V Load Switches
ELECTRICAL CHARACTERISTICS
(TJ = -40℃ to +125℃, VIN = 5V for SGM2533, VIN = 12V for SGM2534, VEN/UVLO = 2V, RILIM = 100kΩ, CSS = Open. All voltages
referenced to GND, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage (IN)
4.1
4.3
210
4.49
UVLO Threshold, Rising
UVLO Hysteresis (1)
VUVR
V
VUVHYS
mV
0.1
0.175
0.185
5
0.25
0.255
10
SGM2533: VEN/UVLO = 2V
IQ_ON
IQ_OFF
VOVC
mA
µA
V
0.105
Supply Current
SGM2534: VEN/UVLO = 2V
VEN/UVLO = 0V
5.5
6.15
14.86
6.7
SGM2533: VIN > 6.75V, IOUT = 10mA
SGM2534: VIN > 16.5V, IOUT = 10mA
Over-Voltage Clamp
13.8
15.9
Enable and Under-Voltage Lockout Input (EN/UVLO)
1.33
1.27
-1.5
1.4
1.35
0
1.48
1.42
1.5
V
V
EN/UVLO Threshold Voltage, Rising
EN/UVLO Threshold Voltage, Falling
EN/UVLO Input Leakage Current
Output Ramp Control (SS)
SS Charging Current (1)
VENR
VENF
IEN
μA
0V ≤ VEN/UVLO ≤ 7V
223
75
nA
Ω
ISS
VSS = 0V
41
107
SS Discharging Resistance
SS Maximum Capacitor Voltage (1)
SS to OUT Gain (1)
RSS
VEN/UVLO = 1.3V, ISS = 10mA sinking
5
V
VSSMAX
GAINSS
4.84
V/V
ΔVSS
Current Limit Programming (ILIM)
ILIM Bias Current (1)
IILIM
10
2.20
3.75
5.07
0.84
2.25
2.24
3.88
3.62
5.36
3.62
1.6 × IOL
2.2
µA
A
1.87
3.40
4.32
2.53
4.08
5.83
RILIM = 45.3kΩ, VIN-OUT = 1V
RILIM = 100kΩ, VIN-OUT = 1V
Overload Current Limit
IOL
RILIM = 150kΩ, VIN-OUT = 1V
Shorted or open resistor current limit
SGM2533: RILIM = 45.3kΩ, VIN-OUT = 5V
SGM2534: RILIM = 45.3kΩ, VIN-OUT = 12V
SGM2533: RILIM = 100kΩ, VIN-OUT = 5V
SGM2534: RILIM = 100kΩ, VIN-OUT = 12V
SGM2533: RILIM = 150kΩ, VIN-OUT = 5V
SGM2534: RILIM = 150kΩ, VIN-OUT = 12V
RILIM in kΩ
1.64
1.50
3
2.79
2.98
4.62
5.25
6.66
6.18
Short-Circuit Current Limit
ISC
A
2.12
3.96
1.32
Fast-Trip Comparator Threshold (1)
ILIM Open Resistor Detect Threshold (1)
Pass FET Output (OUT)
IFAST-TRIP
A
V
VILIM_OPEN
VILIM Rising, RILIM = Open
18
27
27
0
36
54
2
TJ = +25℃
FET On-Resistance
RDSON
mΩ
TJ = -40℃ to +125℃
-2
-2
IOUT_LKG
IOUT_SINK
VEN/UVLO = 0V, VOUT = 0V (Sourcing)
VEN/UVLO = 0V, VOUT = 300mV (Sinking)
OUT Bias Current in Off State
µA
0
2
Thermal Shutdown (TSD)
Thermal Shutdown Threshold, Rising (1)
Thermal Shutdown Hysteresis (1)
TTSD
THYS
155
20
℃
℃
NOTE: 1. Guaranteed by design.
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
4
SGM2533
SGM2534
Simple 5V/12V Load Switches
TIMING REQUIREMENTS
(TJ = -40℃ to +125℃, VIN = 5V for SGM2533, VIN = 12V for SGM2534, VEN/UVLO = 2V, RILIM = 100kΩ, CSS = Open. All voltages
referenced to GND, unless otherwise noted.)
PARAMETER
Turn-On Delay (1)
SYMBOL
CONDITIONS
MIN
TYP
120
2
MAX
UNITS
µs
EN/UVLO↑ to IIN = 100mA, 1A resistive
tON_DLY
load at OUT
Turn-Off Delay (1)
tOFF_DLY
EN/UVLO↓
µs
Output Ramp Control (SS)
SGM2533: EN/UVLO↑ to VOUT = 4.9V,
CSS = 0nF
0.24
0.55
0.42
5
0.61
1.46
SGM2533: EN/UVLO↑ to VOUT = 4.9V,
CSS = 1nF (1)
Output Ramp Time
tSS
ms
SGM2534: EN/UVLO↑ to VOUT = 11.7V,
CSS = 0nF
1
SGM2534: EN/UVLO↑ to VOUT = 11.7V,
12
CSS = 1nF (1)
Current Limit Programming (ILIM)
Fast-Trip Comparator Delay (1)
Thermal Shutdown (TSD)
tFAST-TRIP_DLY IOUT > IFAST-TRIP to switch off
300
ns
SGM2533A and SGM2534A: VIN = 5V
SGM2533A and SGM2534A: VIN = 12V
490
580
Retry Delay after Thermal Shutdown
Recovery, TJ < [TTSD - 20℃] (1)
tTSD_DLY
ms
NOTE: 1. Guaranteed by design.
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
5
SGM2533
SGM2534
Simple 5V/12V Load Switches
FUNCTIONAL BLOCK DIAGRAM
Current
Sense
OUT
IN
27mΩ
+
-
Charge
Pump
Over-
Voltage
nUVLO
EN
4.3V
4.09V
NC
EN
SWEN
+
-
/UVLO
1.4V
1.35V
VIN
5V
Thermal
Shutdown
TSD
10μA
5V
+
-
Gate
Control
IOL
223nA
+
-
ILIM
SS
4.84x
+
-
Fast-Trip
Comparator
nSWEN
1.6 × IOL
75Ω
GND
SGM2533/4
Figure 2. SGM2533/4 Block Diagram
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
6
SGM2533
SGM2534
Simple 5V/12V Load Switches
TYPICAL PERFORMANCE CHARACTERISTICS
TJ = +25℃, VIN = 5V for SGM2533, VIN = 12V for SGM2534, VEN/UVLO = 2V, RILIM = 100kΩ, CSS = Open, CIN = 0.1μF, COUT = 1μF,
unless otherwise noted.
UVLO Threshold Voltage vs. Temperature
Supply Current vs. Input Voltage
TJ = -40℃
TJ = +25℃
TJ = +85℃
TJ = +125℃
4.5
4.4
4.3
4.2
4.1
4.0
3.9
12
10
8
VUVR
6
VUVF
4
2
0
-50 -25
0
25
50
75 100 125 150
0
4
8
12
16
20
Input Voltage (V)
Temperature (℃)
Supply Current vs. Input Voltage
TJ = -40℃
SGM2533
TJ = +25℃
TJ = +85℃
TJ = +125℃
Supply Current vs. Input Voltage
TJ = -40℃
SGM2534
TJ = +25℃
TJ = +85℃
TJ = +125℃
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.30
0.25
0.20
0.15
0.10
0.05
0.00
0
4
8
12
16
20
0
4
8
12
16
20
Input Voltage (V)
Input Voltage (V)
Over-Voltage Clamp vs. Temperature
IOUT = 10mA
Over-Voltage Clamp vs. Temperature
IOUT = 10mA
IOUT = 100mA
IOUT = 500mA
6.5
6.4
6.3
6.2
6.1
6.0
5.9
15.1
15.0
14.9
14.8
14.7
14.6
14.5
SGM2533
SGM2534
-50 -25
0
25
50
75 100 125 150
-50 -25
0
25
50
75 100 125 150
Temperature (℃)
Temperature (℃)
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
7
SGM2533
SGM2534
Simple 5V/12V Load Switches
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TJ = +25℃, VIN = 5V for SGM2533, VIN = 12V for SGM2534, VEN/UVLO = 2V, RILIM = 100kΩ, CSS = Open, CIN = 0.1μF, COUT = 1μF,
unless otherwise noted.
Accuracy vs. Overload Current Limit
Current Limit Resistor vs. Overload Current Limit
60
50
40
30
20
10
0
180
150
120
90
60
30
0
2
2.5
3
3.5
4
4.5
5
0
1
2
3
4
5
6
Overload Current Limit (A)
Overload Current Limit (A)
Output Ramp Time vs. CSS
Output Ramp Time vs. CSS
60
50
40
30
20
10
0
120
100
80
60
40
20
0
SGM2534
TJ = -40℃
TJ = +25℃
TJ = +85℃
TJ = -40℃
TJ = +25℃
TJ = +85℃
TJ = +125℃
SGM2533
TJ = +125℃
0
2
4
6
8
10
0
2
4
6
8
10
CSS (nF)
CSS (nF)
EN/UVLO Threshold Voltage vs. Temperature
On-Resistance vs. Temperature
1.43
45
40
35
30
25
20
15
1.41
1.39
1.37
1.35
1.33
1.31
Rising
Falling
-50 -25
0
25
50
75 100 125 150
-50 -25
0
25
50
75 100 125 150
Temperature (℃)
Temperature (℃)
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
8
SGM2533
SGM2534
Simple 5V/12V Load Switches
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TJ = +25℃, VIN = 5V for SGM2533, VIN = 12V for SGM2534, VEN/UVLO = 2V, RILIM = 100kΩ, CSS = Open, CIN = 0.1μF, COUT = 1μF,
unless otherwise noted.
Overload Current Limit vs. Temperature
Short-Circuit Current Limit vs. VIN-OUT
RILIM = 45.3kΩ
0.88
0.87
0.86
0.85
0.84
0.83
0.82
3.0
2.5
2.0
1.5
1.0
0.5
0.0
RILIM = Short or Open
TJ = -40℃
TJ = +25℃
TJ = +85℃
TJ = +125℃
0
0.2
0.4
0.6
0.8
1
-50
-25
0
25
50
75
100
125
VIN-OUT (V)
Temperature (℃)
Short-Circuit Current Limit vs. VIN-OUT
Short-Circuit Current Limit vs. VIN-OUT
RILIM = 150kΩ
6
6
TJ = -40℃
RILIM = 100kΩ
TJ = +25℃
TJ = +85℃
TJ = +125℃
5
4
3
2
1
0
5
4
3
2
1
0
TJ = -40℃
TJ = +25℃
TJ = +85℃
TJ = +125℃
0
0.2
0.4
0.6
0.8
1
0
0.2
0.4
0.6
0.8
1
VIN-OUT (V)
VIN-OUT (V)
IOL, ISC vs. Temperature
RILIM = 45.3kΩ
IOL, ISC vs. Temperature
RILIM = 100kΩ
6
4
5
3
ISC: SGM2533
ISC: SGM2533
ISC: SGM2534
2
1
IOL
IOL
0
-1
-3
-5
-7
-2
-4
-6
ISC: SGM2534
-50 -25
0
25
50
75 100 125 150
-50 -25
0
25
50
75 100 125 150
Temperature (℃)
Temperature (℃)
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
9
SGM2533
SGM2534
Simple 5V/12V Load Switches
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TJ = +25℃, VIN = 5V for SGM2533, VIN = 12V for SGM2534, VEN/UVLO = 2V, RILIM = 100kΩ, CSS = Open, CIN = 0.1μF, COUT = 1μF,
unless otherwise noted.
IOL, ISC vs. Temperature
Thermal Shutdown Time vs. Power Dissipation
20
10
1000
100
10
RILIM = 150kΩ
ISC: SGM2533
0
IOL
-10
-20
-30
-40
TJ = -40℃
TJ = +25℃
TJ = +85℃
TJ = +125℃
1
ISC: SGM2534
0.1
-50 -25
0
25
50
75 100 125 150
1
10
100
Power Dissipation (W)
Temperature (℃)
Retry Delay vs. Input Voltage
800
700
600
500
400
300
200
4
6
8
10
12
14
16
18
Input Voltage (V)
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
10
SGM2533
SGM2534
Simple 5V/12V Load Switches
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TJ = +25℃, VIN = 5V for SGM2533, VIN = 12V for SGM2534, VEN/UVLO = 2V, RILIM = 100kΩ, CSS = Open, CIN = 0.1μF, COUT = 1μF,
unless otherwise noted.
Output Ramp
Output Ramp
CSS = Open, COUT = 4.7μF
CSS = Open, COUT = 4.7μF
SGM2533
SGM2534
VEN/UVLO
VEN/UVLO
VIN
VIN
VOUT
VOUT
IIN
IIN
Time (100μs/div)
Time (200μs/div)
Over-Voltage Clamp
Over-Voltage Clamp
SGM2533
SGM2534
VIN
VIN
VOUT
VOUT
Time (5ms/div)
Time (10ms/div)
Thermal Fault Auto-Retry
Thermal Fault Latch
VIN = 5V
SGM2533A and SGM2534A
VIN = 5V
SGM2533B and SGM2534B
VEN/UVL
VIN
VOUT
VIN
VOUT
IOUT
IIN
Time (200ms/div)
Time (1ms/div)
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
11
SGM2533
SGM2534
Simple 5V/12V Load Switches
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TJ = +25℃, VIN = 5V for SGM2533, VIN = 12V for SGM2534, VEN/UVLO = 2V, RILIM = 100kΩ, CSS = Open, CIN = 0.1μF, COUT = 1μF,
unless otherwise noted.
Output Short-Circuit
Short-Circuit (Zoom): Fast-Trip Comparator
VIN = 5V, RILIM = 150kΩ
VIN = 5V, RILIM = 150kΩ
VIN
VIN
VOUT
VOUT
IOUT
IOUT
Time (20μs/div)
Time (2μs/div)
Wake Up to Short-Circuit
Recovery from Short-Circuit
VIN = 5V
SGM2533A and SGM2534A
VIN = 5V, CSS = 1nF
SGM2533A and SGM2534A
VIN
VIN
VEN/UVLO
VOUT
VOUT
IIN
IIN
Time (200ms/div)
Time (100ms/div)
Output Short-Circuit
Short-Circuit (Zoom): Fast-Trip Comparator
SGM2534
SGM2534
VIN
VIN
VOUT
VOUT
IOUT
IOUT
VIN = 12V, RILIM = 150kΩ
VIN = 12V, RILIM = 150kΩ
Time (50μs/div)
Time (2μs/div)
SG Micro Corp
www.sg-micro.com
SEPTEMBER 2022
12
SGM2533
SGM2534
Simple 5V/12V Load Switches
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
TJ = +25℃, VIN = 5V for SGM2533, VIN = 12V for SGM2534, VEN/UVLO = 2V, RILIM = 100kΩ, CSS = Open, CIN = 0.1μF, COUT = 1μF,
unless otherwise noted.
Wake Up to Short-Circuit
Recovery from Short-Circuit
SGM2534A
SGM2534A
VIN
VIN
VEN/UVLO
VOUT
VOUT
IIN
IIN
VIN = 12V, CSS = 1nF
VIN = 12V
Time (200ms/div)
Time (100ms/div)
Thermal Fault Auto-Retry
Overload Current Limit
SGM2534A
VIN
VIN
VOUT
VOUT
IOUT
IIN
VIN = 12V
I
LOAD stepped from 65% to 125%, back to 65%
Time (200ms/div)
Time (20ms/div)
Hot-Plug Startup: Output Ramp without Load
on Output
Hot-Plug Startup: Output Ramp with 24Ω Load
at Startup
SGM2534
SGM2534
VEN/UVLO
VEN/UVLO
VOUT
VOUT
VIN
VIN
IIN
IIN
Time (500μs/div)
Time (500μs/div)
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SGM2533
SGM2534
Simple 5V/12V Load Switches
DETAILED DESCRIPTION
Overview
IN
The SGM2533 and SGM2534 are intelligent eFuses
with enhanced built-in protection circuitry. It integrates
over-current and short-circuit protections. Precision
current limit helps to minimize over-design of the input
power supply, while fast response short-circuit
protection isolates the load from the input immediately
when a short-circuit condition is detected. The device
allows the user to program the over-current limit
threshold between 2A and 5A via an external resistor.
The IN pin should be connected to the power source
directly. It is recommended to place a ceramic bypass
capacitor close the device to reduce bus transient. The
input voltage of devices can be sustained up to 20V,
the recommend input voltage range of SGM2534 is
4.5V to 13.8V, and SGM2533 is 4.5V to 5.5V. The
device will enter into over-voltage protection (OVP)
mode, if the input voltage exceeds the maximum
recommended operation condition. The device may
heat up due to power dissipation, and then enter into
the thermal shutdown state.
The over-voltage clamp (OVC) function continuously
monitors the input voltage and ensures the output
clamp voltage to VOVC level once the input spike voltage
occurs. This can protect the safety of output device,
and continuous output clamping condition usually
results in thermal shutdown. Once the junction
temperature exceeds 155℃, the power MOSFET will
be turned off by the thermal shutdown circuitry. For
SGM2533B and SGM2534B, if the power supply or
EN/UVLO is reset (pulled low and then pulled up), the
device tries to turn on the power MOSFET again. For
SGM2533A and SGM2534A, the device is designed a
490ms auto-retry cycle after device temperature drops
to 135℃. Unless the fault is removed, the auto-retry
cycle will be continued.
SS
The capacitor between SS and GND pins will set the
slew rate according to the application requirements. If
floating this pin, the slew rate of the output obtains a
default value (minimum tSS). Equation 1 shows the
calculation process.
dVOUT ISS ×GAINSS
(1)
=
dt
CSS
where:
dVOUT/dt = Desired output slew rate
SS = 223nA (TYP)
GAINSS = 4.84
I
Equation 2 shows how to calculate the total ramp
time (tSS) when the output rises from 0V to VIN:
EN/UVLO
The EN/UVLO is designed to control the device active
and shutdown states. Logic high (exceed VENR) enables
the device and it turns on the internal power MOSFET
and controls the current from IN to the OUT. Once the
input signal under the VENF, it turns off the power
MOSFET. The thermal shutdown latch in SGM2533B
and SGM2534B can be cleared by the EN/UVLO that
toggling this pin (H→L) will restart the device. It is
recommended to add an external bypass capacitor
between EN/UVLO and GND pins to avoid the noisy of
instability power or probabilistic power failure. The
EN/UVLO falling edge de-glitch delay is 1μs (TYP).
tSS = 1 × 106 × VIN × CSS
(2)
When CSS is open, there is a 70pF capacitor (CINT
inside.
)
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SEPTEMBER 2022
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SGM2533
SGM2534
Simple 5V/12V Load Switches
DETAILED DESCRIPTION (continued)
A transient short-circuit is happened, due to the limited
bandwidth of the current limit amplifier, it can not
respond quickly to this event, so the SGM2533 and
SGM2534 contain a fast-trip comparator with a
threshold (IFAST-TRIP). If IOUT > IFAST-TRIP, the comparator
turns off the power MOSFET and terminates the
short-circuit peak current cross the power MOSFET
rapidly. The fast-trip threshold is 1.6 times of the
overload current limit. The fast-trip comparator can
terminate the transient short-circuit peak current, and
then the current limit function limits the output current to
IOL.
ILIM
At all times, load current is monitored by directly
sensing the current flowing through the internal
MOSFET. During overload events, current is limited to
the overload current limit (IOL) programmed by RILIM
IOL = (0.8 + 3 × 10-5 × RILIM
.
)
(3)
Power dissipation of the internal MOSFET is calculated
by PD = (VIN - VOUT) × IOUT. If it is set to constant 40W,
the continue overload state will cause thermal
shutdown.
VIN
IFAST-TRIP
I
FAST-TRIP = 1.6 × IOL
VOUT
IOL
IOUT
Time (50μs/div)
Figure 3. Fast-Trip Current
Figure 4. Fast-Trip and Current Limit Amplifier Response
for Short-Circuit
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SEPTEMBER 2022
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SGM2533
SGM2534
Simple 5V/12V Load Switches
APPLICATION INFORMATION
Typical Application Circuit
Output
Input 4.5V to 18V
IN
OUT
(1)
CIN
R1
1MΩ
COUT
1μF
0.1μF
SGM2534
ILIM
EN/UVLO
RILIM
100kΩ
R2
SS
CSS
GND
NOTE: 1. A 0.1μF CIN is recommended. It is optional.
Figure 5. Simple eFuse for Set-Top Boxes
Assuming IOL = 3.8A, RILIM is calculated as 100kΩ,
Design Requirements
select the resistor with 1% tolerance closest to the
standard value.
Table 1 lists the typical application circuit requirements
of SGM2534.
Table 1. Design Parameters
Set Point for Under-Voltage Lockout
Design Parameter
Input Voltage, VIN
Example Value
12V
Setting the external voltage divider of R1 and R2 will
adjust the under-voltage lockout (UVLO) point of the
device. The R1 and R2 resistors are placed between IN,
EN/UVLO and GND pins. Equation 5 shows how to
Under-Voltage Lockout Set Point, VUV
Default: VUVR = 4.3V
Over-Voltage Protection Set Point, VOV Default: VOVC = 14.86V
Load at Startup, RL(SU)
Current Limit, IOL
4Ω
3.8A
calculate these resistor values:
R1 + R2
R2
(5)
VUV
=
× VENR
Load Capacitance, COUT
Maximum Junction Temperature, TJ
1µF
+125℃
VENR rises over the threshold (1.4V), the device is
turned on.
Input Capacitor
If VIN is less than 7V, the EN/UVLO can be connected to
VIN directly. When VIN is greater than 7V, EN/UVLO is
the partial pressure of VIN.
It is recommended to use a capacitor (0.001μF to 0.1μF)
between IN and GND close to the device pins. It can
limit the voltage drop on the input supply.
The falling edge of power supply is set to detect for
power failure, usually the threshold is 5% lower than
the VUVR (the rising threshold). Equation 6 shows how it
will be calculated:
Power Supply
The power supply range is 4.5V to 13.8V for SGM2534.
If the distance between the power supply and the
device is more than a few inches, it is recommended to
use a higher than 0.1μF input bypass capacitor.
VPFAIL = 0.95 × VUVR
(6)
where VUVR is 4.3V, power fail threshold is 4.09V.
Programmable Current Limit
The overload current limit is programmed by the RILIM
resistor with Equation 4.
IOL - 0.8
3×10-5
(4)
RILIM
=
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SEPTEMBER 2022
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SGM2533
SGM2534
Simple 5V/12V Load Switches
APPLICATION INFORMATION (continued)
For the design example with CSS = open:
Setting Output Ramp Time (tSS)
SS = 1 × 106 × 12V × 70pF = 840μs
(13)
(14)
(15)
The SGM2534 is designed to control the inrush current
when the device is enabled or powered-on. The slew
rate of the output voltage can be set by an external
capacitor from the SS pin to GND defines at power-on.
The ramp-up capacitor (CSS) is calculated considering
the two possible cases.
t
12V
I
= 1μF×
= 14.3mA
INRUSH
840μs
PD(INRUSH) = 0.5 × 12V × 14.3mA = 85.8mW
So it is safe to use 840μs as startup time without any
load on output. Considering the startup with a 4Ω load,
the additional power dissipation is calculated using
Equation 9.
Startup without Load: Only Charge the Output
Capacitance COUT
Once the device startup, the current as load that
charges the output capacitor. This process causes the
inrush current, and it can be calculated by Equation 7.
Combining the voltage difference and the load current,
the power is dissipated across the internal MOSFET.
Equation 8 shows how to calculate the average power
dissipation during startup:
12V ×12V
6× 4Ω
P
=
= 6W
(16)
(17)
D(LOAD)
PD(STARTUP) = 6W + 85.8mW = 6.09W
As shown in Figure 6, when TJ = +85℃, the thermal
shutdown time for 6.09W is higher than 10ms. In order
to prevent the false shutdown at maximum operating
temperature, the ramp time must be less than thermal
shutdown time. So it is safe to select 840μs as startup
time with startup load of 4Ω.
V
IN
I
= COUT ×
(7)
(8)
INRUSH
tSS
PD(INRUSH) = 0.5 × VIN × IINRUSH
1000
100
10
Startup with Load: Output Capacitance COUT and
Load Draws Current
During startup, the load (RL(SU)) current ramps up
proportionally with the increase of output voltage. The
average power dissipation in the internal MOSFET
during charging time is shown in Equation 9 to Equation
12.
TJ = -40℃
TJ = +25℃
TJ = +85℃
TJ = +125℃
1
1
6
V2
IN
(9)
P
=
×
D(LOAD)
RL(SU)
PD(STARTUP) = PD(INRUSH) + PD(LOAD)
ISTARTUP = IINRUSH + ILOAD
(10)
(11)
0.1
1
10
100
Power Dissipation (W)
where:
PD(STARTUP) is the total power dissipation during startup.
STARTUP is total current during startup.
Figure 6. Thermal Shutdown Limit Plot
I
When ISTARTUP > IOL, the device limits the current to IOL
and the current limit charging time is determined by:
IOL
I
INRUSH
(12)
tSS(Current Limit) = COUT ×RL(SU)
×
-1+ ln
V
I
IN
INRUSH
IOL
-
RL(SU)
SG Micro Corp
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SEPTEMBER 2022
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SGM2533
SGM2534
Simple 5V/12V Load Switches
APPLICATION INFORMATION (continued)
can be used to suppress transients as shown in Figure
7.
Transient Protection
In case of turning off the internal MOSFET, such as
VOUT hard short, thermal shutdown, etc., the current
flow path is cut off. The energy stored in parasitic
inductance generates voltage spike. The input
inductance produces a positive voltage spike on the
input, while the output inductance produces a negative
voltage spike on the output. The voltage spike can
exceed the absolute maximum ratings of the device if
the following steps are not taken:
Output
Input 4.5V to 18V
IN
OUT
CIN
0.1μF
SGM2534
EN/UVLO
ILIM
SS
GND
Minimizing lead length and inductance into and out
of the device, including the GND connection.
Schottky diode across the output to absorb negative
spikes.
Figure 7. Circuit Implementation with Optional Protection
Components
A low value ceramic capacitor (CIN = 0.001μF to
0.1μF) to absorb the energy. The approximate value
of CIN can be calculated with Equation 18.
LIN
Layout Guide
It is recommended to use a 0.01μF or larger ceramic
decoupling capacitor between IN and GND pins.
When the input power path inductance is too low to
ignore in hot plug applications, the capacitor can be
minimized.
The path of high current carrying power should be
as short as possible, which is must size to withstand
twice the load current.
VSPIKE(Absolute) = VIN +ILOAD
×
(18)
CIN
where:
VIN is the supply voltage.
LOAD is the load current.
I
LIN equals the effective inductance seen looking into the
source.
CIN is the input capacitance.
The GND pin must be connected to the PCB ground
as short as possible.
Connect the terminal of the RILIM, CSS and resistors
for EN/UVLO to the GND pin with the shortest trace.
These paths and switching signals should not have
any coupling.
The ceramic capacitors, TVS and Schottky diodes
must be placed as close to the device as possible.
Some applications may require the addition of a
transient voltage suppressor (TVS) across the IN pin
and GND to prevent transients from exceeding the
absolute maximum ratings of the device.
Ceramic capacitors, TVS and Schottky diodes are
optional protection components. Optional components
SG Micro Corp
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SEPTEMBER 2022
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SGM2533
SGM2534
Simple 5V/12V Load Switches
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
SEPTEMBER 2022 ‒ REV.A.1 to REV.A.2
Page
Update Absolute Maximum Ratings section.........................................................................................................................................................2
Update Electrical Characteristics section.............................................................................................................................................................4
Update Timing Requirements section ..................................................................................................................................................................5
Update Typical Performance Characteristics section.......................................................................................................................................7, 9
JULY 2022 ‒ REV.A to REV.A.1
Page
Update Absolute Maximum Ratings section.........................................................................................................................................................2
Changes from Original (FEBRUARY 2022) to REV.A
Page
Changed from product preview to production data.............................................................................................................................................All
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SEPTEMBER 2022
19
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
TDFN-3×3-10L
D
e
N10
D1
k
E
E1
N5
N1
b
L
BOTTOM VIEW
TOP VIEW
2.4
1.7 2.8
A
A1
A2
0.6
SIDE VIEW
0.24
0.5
RECOMMENDED LAND PATTERN (Unit: mm)
Dimensions
In Millimeters
Dimensions
In Inches
Symbol
MIN
MAX
0.800
0.050
MIN
0.028
0.000
MAX
0.031
0.002
A
A1
A2
D
0.700
0.000
0.203 REF
0.008 REF
2.900
2.300
2.900
1.500
3.100
2.600
3.100
1.800
0.114
0.091
0.114
0.059
0.122
0.103
0.122
0.071
D1
E
E1
k
0.200 MIN
0.500 TYP
0.008 MIN
0.020 TYP
b
0.180
0.300
0.300
0.500
0.007
0.012
0.012
0.020
e
L
NOTE: This drawing is subject to change without notice.
SG Micro Corp
TX00060.000
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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
TDFN-3×3-10L
13″
12.4
3.35
3.35
1.13
4.0
8.0
2.0
12.0
Q1
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TX10000.000
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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
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TX20000.000
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