TPSM843820
ZHCSPU4A –OCTOBER 2023 –REVISED DECEMBER 2023
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5.5 Electrical Characteristics (Module)
TJ = –40°C to +125°C, VVIN = 4 V - 18 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SUPPLY VOLTAGE
IQ(VIN)
VEN = 1.3 V, VFB = 550 mV, VVIN = 12 V, 1
MHz
VIN operating non-switching supply current
1200
1600
µA
ISD(VIN)
VIN shutdown supply current
VIN UVLO rising threshold
VIN UVLO hysteresis
VEN = 0 V, VVIN = 12 V
VIN rising
15
4
25
µA
V
3.9
4.1
150
mV
ENABLE AND UVLO
VEN(rise)
EN voltage rising threshold
EN voltage falling threshold
EN voltage hysteresis
EN rising, enable switching
EN falling, disable switching
1.2
1.1
1.25
V
V
VEN(fall)
1.05
0.4
VEN(hyst)
100
1.5
mV
µA
µA
EN pin sourcing current
EN pin sourcing current
VEN = 1.1 V
VEN = 1.3 V
11.6
INTERNAL LDO BP5
VBP5
Internal LDO BP5 output voltage
BP5 dropout voltage
VVIN = 12 V
4.5
75
V
350
505
mV
mA
V
VIN –VBP5, VVIN = 3.8 V
BP5 short-circuit current limit
VVIN = 12 V
REFERENCE VOLTAGE
VFB
Feedback Voltage
Input leakage current into FB pin
495
500
1
mV
nA
TJ = –40°C to 125°C
VFB = 500 mV, non-switching, VVIN = 12 V,
VEN = 0 V
IFB(LKG)
SWITCHING FREQUENCY AND OSCILLATOR
fSW
Switching frequency
Switching frequency
Switching frequency
Switching frequency
Switching frequency
450
675
500
750
550
825
kHz
kHz
kHz
kHz
kHz
RFSEL = 24.3 kΩ
RFSEL = 17.4 kΩ
RFSEL = 11.8 kΩ
RFSEL = 8.06 kΩ
RFSEL = 4.99 kΩ
fSW
fSW
900
1000
1500
2200
1100
1650
2420
fSW
1350
1980
fSW
SYNCHRONIZATION
VIH(sync)
VIL(sync)
High-level input voltage
Low-level input voltage
1.8
V
V
0.8
SOFT-START
tSS1
Soft-start time
Soft-start time
Soft-start time
Soft-start time
0.5
1
ms
ms
ms
ms
RMODE = 1.78 kΩ
RMODE = 2.21 kΩ
RMODE = 2.74 kΩ
RMODE = 3.32 kΩ
tSS2
tSS3
2
tSS4
4
POWER STAGE
RDS(on)HS
RDS(on)LS
VBOOT-SW(UV_r)
VBOOT-SW(UV_f)
TON(min)
TOFF(min)
High-side MOSFET on-resistance
Low-side MOSFET on-resistance
BOOT-SW UVLO rising threshold
BOOT-SW UVLO falling threshold
Minimum ON pulse width
TJ = 25°C, VVIN = 12 V, VBOOT-SW = 4.5 V
TJ = 25°C, VBP5 = 4.5 V
VBOOT-SW rising
25
6.5
3.2
2.8
30
mΩ
mΩ
V
VBOOT-SW falling
V
IOUT > ½ IL_PK-PK
37
ns
Minimum OFF pulse width (1)
115
140
ns
CURRENT SENSE AND OVERCURRENT PROTECTION
IOC_HS_pk1
IOC_HS_pk2
IOC_LS_src1
IOC_LS_src2
IOC_LS_snk
High-side peak current limit (8A)
High-side peak current limit (8A)
Low-side sourcing current limit(8A)
Low-side sourcing current limit(8A)
Low-side sinking current limit
11.7
8.6
12.2
9
12.7
9.6
A
A
A
A
A
RMODE = 1.78 kΩ
RMODE = 22.1 kΩ
RMODE = 1.78 kΩ
RMODE = 22.1 kΩ
Current into SW pin
9.4
10.4
7.4
11.3
8.5
6.2
2.95
Copyright © 2023 Texas Instruments Incorporated
5
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English Data Sheet: SLUSEU1