SGM2578
Ultra Small, Low Input Voltage,
Low RON Load Switch
GENERAL DESCRIPTION
FEATURES
The SGM2578 is an ultra small, low RON load switch
● Low Input Voltage: 1V to 5V
with controlled turn on. The device contains an
● Ultra Low On-State Resistance (RON)
N-channel MOSFET that operates over an input
RON = 54mΩ at VIN = 5.0V
voltage range of 1V to 5V. The switch is controlled by
RON = 54mΩ at VIN = 3.6V
EN pin, which is capable of interfacing directly with low
RON = 58mΩ at VIN = 2.5V
voltage control signals.
RON = 74mΩ at VIN = 1.8V
RON = 84mΩ at VIN = 1.2V
SGM2578 device limits the output current to a safe
level by using a constant current mode when the output
load exceeds the current-limit threshold. An internal
reverse voltage comparator disables the power switch
when the output voltage is driven higher than the input
to protect devices on the input side of the switch.
The SGM2578 is available in a Green WLCSP-0.9×0.9-4B
package and operates over a temperature range of
-40℃ to +85℃.
RON = 84mΩ at VIN = 1.0V
● 1A Maximum Continuous Switch Current
● Quiescent Current: 5μA (TYP)
● Shutdown Current: < 1.5μA
● Low Control Input Thresholds Enable Use of
Low-Voltage Logic
● Controlled Slew Rate to Avoid Inrush Currents
● Quick Output Discharge (QOD)
● Evaluated to IEC 60950-1, Ed 2, Am1, Annex CC,
Test Program 1 with CB Report
● Available in a Green WLCSP-0.9×0.9-4B Package
APPLICATIONS
Battery Powered Equipment
Portable Industrial Equipment
Portable Medical Equipment
Portable Media Players
Point of Sales Terminal
GPS Devices
TYPICAL APPLICATION
VIN
Power
Supply
VOUT
CIN
SGM2578
ON
OFF
CL
RL
EN
GND
Figure 1. Typical Application Circuit
SG Micro Corp
www.sg-micro.com
MAY 2019 – REV. B
Ultra Small, Low Input Voltage,
Low RON Load Switch
SGM2578
PACKAGE/ORDERING INFORMATION
MODEL
PACKAGE
DESCRIPTION
SPECIFIED
TEMPERATURE
RANGE
ORDERING
NUMBER
PACKAGE
MARKING
PACKING
OPTION
SGM2578
WLCSP-0.9×0.9-4B
-40℃ to +85℃
SGM2578YG/TR
K2
XX
Tape and Reel, 3000
MARKING INFORMATION
NOTE: XX = Date Code.
YY
XX
Serial Number
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.
ABSOLUTE MAXIMUM RATINGS
Input Voltage Range, VIN ................................ -0.3V to +5.5V
Output Voltage Range, VOUT .................. -0.3V to (VIN + 0.3V)
EN Voltage Range, VEN .................................. -0.3V to +5.5V
Maximum Continuous Switch Current, IMAX
VIN ≥ 1.2V.................................................................. 1000mA
VIN = 1.0V ................................................................... 600mA
Package Thermal Resistance
WLCSP-0.9×0.9-4B, θJA .......................................... 188℃/W
Junction Temperature .................................................+150℃
Storage Temperature Range......................... -65℃ to +150℃
Lead Temperature (Soldering, 10s) ............................+260℃
ESD Susceptibility
HBM ............................................................................. 2000V
MM ................................................................................. 300V
RECOMMENDED OPERATING CONDITIONS
Operating Temperature Range ....................... -40℃ to +85℃
Input Voltage Range, VIN...........................................1V to 5V
EN Voltage Range, VEN.............................................0V to 5V
Output Voltage Range, VOUT .................................... 0V to VIN
SG Micro Corp
www.sg-micro.com
OVERSTRESS CAUTION
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.
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.
Failure to observe proper handling and installation
procedures can cause damage. ESD damage can range from
subtle performance degradation to complete 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.
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, or specifications without prior notice.
MAY 2019
2
Ultra Small, Low Input Voltage,
Low RON Load Switch
SGM2578
PIN CONFIGURATION
(TOP VIEW)
A1
VOUT
A2
VIN
B1
GND
B2
EN
WLCSP-0.9×0.9-4B
PIN DESCRIPTION
PIN
NAME
FUNCTION
A1
VOUT
A2
VIN
B1
GND
B2
EN
Switch Output.
Switch Input and Power Supply. Bypass this input with an optional
ceramic capacitor to ground. See Application Information section.
Ground.
Switch Control Input. Active high. EN is internally pulled down and
pull-down resistor is about 560kΩ.
FUNCTIONAL TABLE
EN
VIN to VOUT
VOUT to GND
L
Off
On
H
On
Off
SG Micro Corp
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MAY 2019
3
Ultra Small, Low Input Voltage,
Low RON Load Switch
SGM2578
ELECTRICAL CHARACTERISTICS
(Full = -40℃ to +85℃, VIN = 3.6V, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
TEMP
MIN
TYP
MAX
UNITS
Power Supplies and Currents
Quiescent Current
Off-State Supply Current
Off-State Supply Current
EN Pin Pull-Down Resistor
IIN
IOUT = 0, VIN = VEN
Full
5
12
μA
IIN(OFF)
VEN = GND, VOUT = Open
Full
0.01
1.5
μA
IIN(LEAK)
VEN = GND, VOUT = 0V
RPULL-DOWN
Full
+25℃
360
0.01
1
μA
560
800
kΩ
Resistance and Switch Characteristics
On-State Resistance
Output Pull-Down Resistance
RON
RPD
IOUT = 200mA
VIN = 5.0V
+25℃
54
VIN = 3.6V
+25℃
54
VIN = 2.5V
+25℃
58
VIN = 1.8V
+25℃
74
VIN = 1.2V
+25℃
84
VIN = 1.0V
+25℃
84
+25℃
50
VIN = 3.3V, VEN = GND,
IOUT = 30mA
mΩ
Ω
EN
Enable Input Logic High Voltage
VIH
Enable Input Logic Low Voltage
VIL
VIN = 1V to 5V
+25℃
1.6
+25℃
0
V
0.4
V
Switching Characteristics
+25℃
680
+25℃
3.4
+25℃
590
tF
+25℃
2.6
Turn-On Time
tON
+25℃
695
Turn-Off Time
tOFF
VOUT Rise Time
tR
VOUT Fall Time
tF
Turn-On Time
tON
Turn-Off Time
tOFF
VOUT Rise Time
tR
VOUT Fall Time
SG Micro Corp
www.sg-micro.com
VIN = 3.6V, RL = 10Ω, CL = 0.1µF
VIN = 1.0V, RL = 10Ω, CL = 0.1µF
+25℃
34
+25℃
435
+25℃
14
μs
μs
MAY 2019
4
Ultra Small, Low Input Voltage,
Low RON Load Switch
SGM2578
TYPICAL PERFORMANCE CHARACTERISTICS
Off-State Supply Current (IIN(OFF)) vs. Input Voltage
VEN = GND, VOUT = Open
0.5
0.4
TA = +85℃
0.3
0.2
0.1
0.0
Off-State Supply Current (IIN(LEAK)) vs. Input Voltage
0.12
Off-State Supply Current (μA)
Off-State Supply Current (μA)
0.6
TA = +25℃
1
1.5
2
TA = -40℃
2.5
3
3.5
Input Voltage (V)
4
4.5
0.08
0.06
0.04
0.02
0.00
5
VEN = GND, VOUT = 0V, TA = +25℃
0.10
1
Quiescent Current vs. Input Voltage
On-State Resistance (mΩ)
TA = +25℃
6.0
TA = -40℃
4.5
3.0
1.5
VOUT = Open
4.5
5
1
1.5
2
2.5
3
3.5
4
4.5
5
TA = +85℃
100
TA = +25℃
80
40
20
IOUT = 200mA
1
1.5
2
VIN = 2.5V
VIN = 3.6V
VIN = 5.0V
70
60
50
IOUT = 200mA
-15
10
35
Temperature (℃)
SG Micro Corp
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3
3.5
4
4.5
5
60
On-State Resistance vs. Load Current
100
80
-40
2.5
Input Voltage (V)
On-State Resistance (mΩ)
VIN = 1.0V
VIN = 1.2V
VIN = 1.8V
TA = -40℃
60
0
On-State Resistance vs. Temperature
On-State Resistance (mΩ)
4
120
Input Voltage (V)
40
3.5
140
7.5
90
3
On-State Resistance vs. Input Voltage
TA = +85℃
9.0
100
2.5
160
10.5
Quiescent Current (μA)
2
Input Voltage (V)
12.0
0.0
1.5
85
VIN = 1.0V VIN = 2.5V
VIN = 1.2V VIN = 3.6V
VIN = 1.8V VIN = 5.0V
90
80
70
60
50
40
TA = +25℃
0
0.2
0.4
0.6
0.8
1
Load Current (A)
MAY 2019
5
Ultra Small, Low Input Voltage,
Low RON Load Switch
SGM2578
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Output Pull-Down Resistance vs. Output Current
VIN = 3.6V,
TA = +25℃
45.5
45.0
44.5
44.0
43.5
43.0
42.5
42.0
0
5
10
15
20
25
Output Pull-Down Resistance vs. Input Voltage
120
Output Pull-Down Resistance (Ω)
Output Pull-Down Resistance (Ω)
46.0
100
90
80
70
60
50
40
30
IOUT = 1mA,
TA = +25℃
110
1
1.5
2
Output Current (mA)
2
1
0
4
4.5
5
1
0
0
0.4
0.8
1.2
1.6
-1
2
0
0.4
0.8
CL = 1μF,
RL = 10Ω,
VEN = 1.8V
1400
TA = -40℃
1200
Rise Time (μs)
1200
1.6
2
Rise Time vs. Input Voltage (CL = 1μF)
1600
CL = 0.1μF,
RL = 10Ω,
VEN = 1.8V
1400
1.2
EN Voltage (V)
Rise Time vs. Input Voltage (CL = 0.1μF)
1600
Rise Time (μs)
3.5
2
EN Voltage (V)
TA = -40℃
1000
1000
TA = +25℃
800
600
400
1
1.5
2
2.5
3
3.5
Input Voltage (V)
SG Micro Corp
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4
TA = +25℃
800
600
400
TA = +85℃
200
0
3
Output Voltage vs. EN Voltage Threshold (EN Pin Voltage Increasing)
7
VIN = 1.0V
TA = +25℃
VIN = 1.2V
6
Rising Edge
VIN = 1.8V
5
VIN = 2.5V
VIN = 3.3V
4
VIN = 3.6V
VIN = 5.0V
3
Output Voltage (V)
Output Voltage (V)
Output Voltage vs. EN Voltage Threshold (EN Pin Voltage Decreasing)
7
VIN = 1.0V
TA = +25℃
6 VIN = 1.2V
Falling Edge
VIN = 1.8V
5 VIN = 2.5V
VIN = 3.3V
4 VIN = 3.6V
VIN = 5.0V
3
-1
2.5
Input Voltage (V)
TA = +85℃
200
4.5
5
0
1
1.5
2
2.5
3
3.5
4
4.5
5
Input Voltage (V)
MAY 2019
6
Ultra Small, Low Input Voltage,
Low RON Load Switch
SGM2578
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Rise Time vs. Temperature
900
VIN = 3.6V, CL = 0.1μF, RL = 10Ω
650
800
600
750
550
Rise Time (μs)
Rise Time (μs)
850
Rise Time vs. Temperature
700
700
650
600
500
450
400
350
550
500
VIN = 1.0V, CL = 0.1μF, RL = 10Ω
-40
-15
10
35
60
300
85
-40
-15
Temperature (℃)
Fall Time vs. Temperature
2.58
2.56
VIN = 3.6V, CL = 0.1μF, RL = 10Ω
900
Fall Time (μs)
Fall Time (μs)
2.50
2.48
85
300
2.44
0
-40
-15
10
35
60
-150
85
-40
-15
10
35
Temperature (℃)
Temperature (℃)
Turn-On Time vs. Temperature
1200
VIN = 3.6V, CL = 0.1μF, RL = 10Ω
1100
1000
Turn-On Time (μs)
Turn-On Time (μs)
60
VIN = 1.0V, CL = 0.1μF, RL = 10Ω
450
150
900
800
700
600
500
400
85
600
2.46
1100
60
750
2.52
1200
35
Fall Time vs. Temperature
1050
2.54
2.42
10
Temperature (℃)
Turn-On Time vs. Temperature
VIN = 1.0V, CL = 0.1μF, RL = 10Ω
1000
900
800
700
600
500
-40
-15
10
35
Temperature (℃)
SG Micro Corp
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60
85
400
-40
-15
10
35
60
85
Temperature (℃)
MAY 2019
7
Ultra Small, Low Input Voltage,
Low RON Load Switch
SGM2578
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
3.56
2100
VIN = 3.6V, CL = 0.1μF, RL = 10Ω
1800
3.48
Turn-Off Time (μs)
Turn-Off Time (μs)
3.52
Turn-Off Time vs. Temperature
3.44
3.40
3.36
3.32
3.28
3.24
Turn-Off Time vs. Temperature
VIN = 1.0V, CL = 0.1μF, RL = 10Ω
1500
1200
900
600
300
0
-40
-15
10
35
60
-300
85
-40
-15
10
35
Temperature (℃)
Temperature (℃)
Turn-On Response Time
Turn-On Response Time
60
85
500mV/div
1V/div
VOUT
500mV/div
500mV/div
VEN
VEN
VOUT
VIN = 3.6V, CL = 1μF, RL = 10Ω
VIN = 1.0V, CL = 1μF, RL = 10Ω
Time (200μs/div)
Time (200μs/div)
Turn-On Response Time
Turn-On Response Time
500mV/div
500mV/div
VOUT
500mV/div
1V/div
VEN
VEN
VOUT
VIN = 3.6V, CL = 0.1μF, RL = 10Ω
Time (200μs/div)
SG Micro Corp
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VIN = 1.0V, CL = 0.1μF, RL = 10Ω
Time (200μs/div)
MAY 2019
8
Ultra Small, Low Input Voltage,
Low RON Load Switch
SGM2578
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Turn-Off Response Time
Turn-Off Response Time
VEN
VEN
VOUT
500mV/div
500mV/div
VIN = 1.0V, CL = 1μF, RL = 10Ω
VIN = 3.6V, CL = 1μF, RL = 10Ω
Time (10μs/div)
Time (10μs/div)
Turn-Off Response Time
Turn-Off Response Time
VEN
VEN
500mV/div
500mV/div
VOUT
Time (10μs/div)
VOUT
VIN = 1.0V, CL = 0.1μF, RL = 10Ω
500mV/div
1V/div
VIN = 3.6V, CL = 0.1μF, RL = 10Ω
SG Micro Corp
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500mV/div
1V/div
VOUT
Time (10μs/div)
MAY 2019
9
Ultra Small, Low Input Voltage,
Low RON Load Switch
SGM2578
FUNCTIONAL BLOCK DIAGRAM
VIN
Charge Pump
Control Logic
&
SR Control
EN
CSR
560kΩ
Pull-Down
Resistor
VOUT
SGM2578
GND
Figure 2. Block Diagram
PARAMETER MEASUREMENT INFORMATION
VIN
VOUT
CIN = 1μF
CL
SGM2578
ON
RL
EN
OFF
GND
VEN
50%
50%
VOUT
tR
tOFF
tON
50%
50%
tF
90%
VOUT
10%
90%
10%
NOTE: Rise and fall times of the control signal are 100ns
Figure 3. Test Circuit and tON/tOFF Waveforms
SG Micro Corp
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MAY 2019
10
SGM2578
Ultra Small, Low Input Voltage,
Low RON Load Switch
APPLICATION INFORMATION
Enable Control
The EN pin controls the state of the switch. Asserting
EN high enables the switch. EN is active high and has a
low threshold making it capable of interfacing with
low-voltage control signals. The EN pin is compatible
with standard GPIO logic threshold. It can be used with
any microcontroller with 1.5V or higher GPIOs. Enable
control pin has 560kΩ internal pull-down resistor.
Over-Current Condition
The SGM2578 responds to over-current condition by
limiting output current to the ILIMIT = 1.6A (TYP). When
an over-current condition is detected, the device
maintains a constant output current and reduces the
output voltage accordingly.
Reverse Voltage Protection
The reverse voltage protection turns off the N-channel
MOSFET whenever the output voltage exceeds the
input voltage by 40mV (TYP) for 5ms (TYP). This
prevents damage to devices on the input side of the
SGM2578. The SGM2578 device allows the N-channel
MOSFET to turn on once the output voltage goes below
the input voltage.
Thermal Sense
The SGM2578 has self-protection features using
thermal sensing circuits that monitor the operating
temperature of the power switch. The thermal sensor
turns off the power switch when the die temperature
exceeds 140 ℃ (TYP). Hysteresis is built into the
Input and Output Capacitance
Input and output capacitance improves the
performance of the device; the actual capacitance
should be optimized for the particular application. For
all applications, a 1μF or greater ceramic bypass
capacitor between VIN and GND is recommended as
close to the device as possible. This precaution
reduces ringing on the input due to power-supply
transients. Additional input capacitance may be needed
on the input to reduce voltage overshoot from
exceeding the absolute maximum voltage of the device
during heavy transient conditions. This is especially
important during bench testing when long inductive
cables are used to connect the evaluation board to the
bench power-supply.
Placing a high-value electrolytic capacitor on the output
pin is recommended when large transient currents are
expected on the output.
Board Layout
For best performance, all traces should be as short as
possible. To be most effective, the input and output
capacitors should be placed close to the device to
minimize the effects that parasitic trace inductances
may have on normal operation. Using wide traces for
VIN, VOUT, and GND helps minimize the parasitic
electrical effects along with minimizing the case to
ambient thermal impedance.
thermal sensor, and the switch turns on after the device
has cooled down approximately 20℃.
SG Micro Corp
www.sg-micro.com
MAY 2019
11
SGM2578
Ultra Small, Low Input Voltage,
Low RON Load Switch
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
MAY 2019 ‒ REV.A.4 to REV.B
Page
Updated Package/Ordering Information section ................................................................................................................................................... 2
AUGUST 2018 ‒ REV.A.3 to REV.A.4
Page
Updated Typical Performance Characteristics section ......................................................................................................................................... 9
MARCH 2018 ‒ REV.A.2 to REV.A.3
Page
Updated Feature section ..................................................................................................................................................................................... 1
Update Typical Performance Characteristics section ........................................................................................................................................... 5
MAY 2017 ‒ REV.A.1 to REV.A.2
Page
Updated Packing Option ...................................................................................................................................................................................... 2
JUNE 2014 ‒ REV.A to REV.A.1
Page
Changed the package........................................................................................................................................................................................ 13
Changes from Original (MAY 2014) to REV.A
Page
Changed from product preview to production data ............................................................................................................................................. All
SG Micro Corp
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MAY 2019
12
PACKAGE INFORMATION
PACKAGE OUTLINE DIMENSIONS
WLCSP-0.9×0.9-4B
A1 CORNER
4×Φ
0.180
0.220
0.5
0.5
0.040± 0.010
RECOMMENDED LAND PATTERN
0.900± 0.040
0.340± 0.025
4 × Φ 0.230± 0.020
1
2
A
0.500
B
0.175± 0.020
SIDE VIEW
0.900± 0.040
TOP VIEW
0.500
BOTTOM VIEW
NOTE: All linear dimensions are in millimeters.
SG Micro Corp
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TX00102.000
PACKAGE INFORMATION
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2
W
P0
Q1
Q2
Q1
Q2
Q1
Q2
Q3
Q4
Q3
Q4
Q3
Q4
B0
Reel Diameter
A0
P1
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
Diameter
Reel Width
W1
(mm)
A0
(mm)
B0
(mm)
K0
(mm)
P0
(mm)
P1
(mm)
P2
(mm)
W
(mm)
Pin1
Quadrant
WLCSP-0.9×0.9-4B
7″
9.2
1.00
1.00
0.70
4.0
4.0
2.0
8.0
Q1
SG Micro Corp
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TX10000.000
DD0001
Package Type
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)
Pizza/Carton
7″ (Option)
368
227
224
8
7″
442
410
224
18
SG Micro Corp
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DD0002
Reel Type
TX20000.000
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