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UNISONIC TECHNOLOGIES CO., LTD
S3515
CMOS IC
PC POWER SUPPLY
SUPERVISORS
DESCRIPTION
The UTC S3515 is specially designed for switching power supply
system. It provides over-voltage protection, over-current protection,
under-voltage protection, on/off control and power good signal generating.
OVP/UVP (Over/Under-Voltage Protection) monitors 3.3V, 5V and
double 12V to protect our power supply and PC, FPO goes to high when
one of these supply voltages exceeds their normal operation voltage
range.
OCP (Over Current Protection) monitors IS33, IS5, IS12 input
current. The voltage difference across external current shunt is used for
OCP functions. An external resistor which is connected between the RI
pin and the GND pin can be used to adjust protection threshold. To
achieve better immunity for lighting surge glitch and to prevent
accidental power shut down during dynamic loading condition, the
de-bounce time for UVP/OCP is 73us respectively. The deglitch time for
OVP is 73uS for better noise immunity.
The power supply is turned on after 38mS de-bounce time when
PSON signal is set from high to low. To turn off power supply, PSON
signal is set from low to high and the de-bounce time is 115mS. When
PGI input voltage level is lower than the internal 1.15V reference
voltage, after 73uS de-bounce time, the PGO signal is pulled low.
DIP-14
SOP-14
FEATURES
* Over/Under-Voltage Protection for 3.3V, 5V, and Two 12V
* Over-Current Protection for 3.3V, 5V, and Two 12V
* PGO and FPO pins with Open Drain Output Stage
* 300mS Power Good Delay from PGI to PGO
* 75mS Delay for 3.3V, 5V and 12V Power Turn on
* 2.8mS Delay for PSON Control to FPO Turn off
* 38mS / 115mS PSON on/off De-Bounce Time
* 73uS width Noise Deglitches
* 73uS De-Bounce Time for UVP and OCP
* Wide Supply Voltage Range
ORDERING INFORMATION
Ordering Number
Lead Free Plating
Halogen Free
S3515L-D14-T
S3515G-D14-T
S3515L-S14-R
S3515G-S14-R
S3515L-S14-T
S3515G-S14-T
www.unisonic.com.tw
Copyright © 2010 Unisonic Technologies Co., Ltd
Package
Packing
DIP-14
SOP-14
SOP-14
Tube
Tape Reel
Tube
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S3515
CMOS IC
PIN CONFIGURATION
PGI
1
14
PGO
GND
2
13
VDD
FPO
3
12
VS5
PSON
4
11
VS33
IS12
5
10
VS12
RI
6
9
IS33
VS12B
7
8
IS5
PIN DESCRIPTION
PIN NO
1
3
PIN NAME
PGI
FPO
TYPE
input
output
4
PSON
input
8
9
IS5
IS33
input
input
5
IS12
input
6
RI
input
12
7
10
11
13
VS5
VS12B
VS12
VS33
VDD
input
input
input
input
power
14
PGO
output
2
GND
power
DESCRIPTION
Power good input.
Fault protection output, open drain output stage.
Power on/off control signal sends from CPU or main-board. The power
supply will be turned on/off after 38mS/115mS respectively.
5V over current protection.
3.3V over current protection.
12V over current protection. Regarding typical application, this pin is
connected to the positive end of a current shunt through one resistor.
When the voltage on IS12 is higher than that of VS12 by 5mV, OCP
will be enabled. One current sink, 8 x IREF, is used to determine the
voltage drop between the positive end of the current shunt and VS12.
Adjusting the value of the external resistor can adjust the threshold for
OCP accordingly. The operation for IS5 or IS33 is the same.
Current sense setting. An external resistor Ri is connected between RI
pin and GND pin will adjust a reference current, IREF = 1.15/Ri, for OCP
function.
5V over/under-voltage protection.
Second 12V over/under-voltage protection.
12V over/under-voltage protection.
3.3V over/under-voltage protection.
Supply voltage. 4V ~ 15V.
Power good logic output, open drain output stage. The power good
delay is 300mS from PGI to PGO.
Ground.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 8
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CMOS IC
BLOCK DIAGRAM
PWR
Power On Reset
2.4 ms
Clr
delay
38ms /115ms
debounce
PSON
RST
UN
+
VS33
PWR
Clr
Bandgap
Reference
75ms
delay
VREF=1.15 V
OV
+
UN
+
VS 5
OV
+
UN
+
VS12A
OV
+
RST
UN
+
VS12 B
73µs
debounce
OV
+
FPO
R
S Q
RST
VREF
PGI
IS 33
IS5
IS12
UN
+
V12A
+
I REF×8
V12A
+
I REF×8
V12A
+
73µs
debounce
VREF=1.15 V
clr
PGO
300ms
delay
+
-
I REF=VREF/RI
RI
V12A
+
I REF×8
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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S3515
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
DC Supply Voltage
Input Voltage (PSON, VS33, VS5, PGI)
SYMBOL
VDD
VIN
RATINGS
UNIT
-0.3 ~ 16
V
-0.3 ~ 8
V
-0.3 ~ 16
Output Voltage (FPO)
VOUT
V
-0.3 ~ 8
Power Dissipation (PGO)
PD
400
mW
Operating Temperature
TOPR
-40 ~ +85
°C
Storage Temperature
TSTG
-55 ~ +150
°C
Note 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. Stresses above those listed may cause permanent damage to the device.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
DC Supply Voltage
VDD
Input Voltage (PSON, VS33, VS5, IS33, IS5, PGI)
VIN
Input Voltage (VS12,VS12B, IS12)
FPO
Output Voltage
VOUT
PGO
FPO
Output Sink Current
IO(SINK)
PGO
Supply Voltage Rising Time (Note)
tR
Output Current RI
IRI
Note VDD rising and falling slew rate must be less than 14V/mS.
RATINGS
4 ~ 15
7
15
15
7
20
10
1
12.5 ~ 62.5
UNIT
V
V
V
mA
mS
µA
ELECTRICAL CHARACTERISTICS (VDD=12V, TA=25°C)
PARAMETER
SYMBOL
UNDER-VOLTAGE AND PGI, PGO
Input Threshold Voltage PGI
VPGI
Under-voltage protect VS33
VUVp
Under-voltage protect VS5
Under-voltage protect VS12, VS12B
Low Level Output Voltage (PGO)
VOL
Leakage Current (PGO)
ILEAK
Under-voltage Enable Delay Time
Timing PG Delay
PGI to PGO
tPG
Noise Deglitch Time
PGI to PGO
Timing UVP to Protection (FPO)
TUVP
OVER-VOLTAGE AND OVER-CURRENT PROTECTION
Over-Voltage Protection
VS33
VOVP
Over-Voltage Protection
VS5
Over-Voltage Protection
VS12, VS12B
Ratio of Current Sense Sink Current to Current
IREF
Sense Setting Pin (RI) Source Current
Current Source Reference Voltage
VREF
OCP Comparator Input Offset Voltage
VI(OFF)
Low Level Output Voltage (FPO)
VOL
Leakage Current (FPO)
ILEAK
Timing OVP to Protection
TOVP
Timing OCP to Protection
TOCP
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
TEST CONDITIONS
MIN
TYP
MAX
UNIT
1.1
2.6
4.0
9.4
1.15
2.8
4.2
9.9
1.2
3.0
4.4
10.4
0.7
5
114
450
350
V
VDD = 12V ISINK =10mA
PGO = 5V
49
200
150
75
300
250
73
3.7
5.7
13.2
3.9
6.1
13.8
4.1
6.5
14.4
7.6
8
1.1
-5
1.15
1.2
5
0.7
5
V
μA
mS
mS
μS
μS
8.4
VS33,VS5, VS12,VS12B
RI = 30 ΚΩ,
0.1% Resistor
V
ISINK =20mA
V(FPO) = 5V
73
73
V
V
mV
V
µA
μS
μS
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CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
PARAMETER
PSON CONTROL
High-Level Input Voltage
Low-Level Input Voltage
Timing PGO Low to FPO High
Timing PSON to On/Off
SYMBOL
MIN
VIH
VIL
1.6
24
24
TYP
MAX
UNIT
0.98
4.0
57
57
V
V
mS
mS
mS
μA
1.9
TPSOFF
ON
OFF
Input Pull-up Current
TOTAL DEVICE
Supply Current
VDD Start Threshold Voltage
VDD Min. Operation Voltage After Start-up
IPSON
PSON = 0V
2.8
38
38
120
IDD
VTHD
VMIN
PSON = 5V, VDD = 5V
1.0
TPSON
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
TEST CONDITIONS
3.65
1.8
4.0
mA
V
V
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CMOS IC
TYPICAL APPLICATION CIRCUIT
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www.unisonic.com.tw
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CMOS IC
TIMING DIAGRAM
PSON On/Off and 3.3V, 5V,12V OVP Function
VDD
PSON
TPSON(ON)
TPSON(OFF)
FPO
TOVP
PGI
T PSOFF
TPG
PGO
3.3V,5V,12V
3.3V,5 V,12V OVP UVP and OCP Function
VDD
PSON
FPO
PGI
TOVP
TUVP
PGO
12V
OCP
TOCP
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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