SLVSBN0 – MARCH 2013
ELECTRICAL CHARACTERISTICS
T
J
= –40°C to 150°C, VIN = 4.5 to 60V (unless otherwise noted)
PARAMETER
SUPPLY VOLTAGE (VIN PIN)
Operating input voltage
Internal undervoltage lockout threshold
Internal undervoltage lockout threshold
hysteresis
Shutdown supply current
Operating: nonswitching supply current
ENABLE AND UVLO (EN PIN)
Enable threshold voltage
Input current
Hysteresis current
Enable to COMP active
INTERNAL SOFT-START TIME
Soft-Start Time
Soft-Start Time
VOLTAGE REFERENCE
Voltage reference
HIGH-SIDE MOSFET
On-resistance
ERROR AMPLIFIER
Input current
Error amplifier transconductance (g
M
)
–2
μA
< I
COMP
< 2
μA,
V
COMP
= 1 V
50
350
77
10,000
2500
V
(COMP)
= 1 V, 100 mV overdrive
±30
17
All VIN and temperatures, Open Loop
(1)
Current limit threshold
All temperatures, VIN = 12 V, Open Loop
VIN = 12 V, T
A
= 25°C, Open Loop
(1)
Current limit threshold delay
THERMAL SHUTDOWN
Thermal shutdown
Thermal shutdown hysteresis
TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK PIN)
Switching frequency range using RT mode
f
SW
Switching frequency
Switching frequency range using CLK mode
Minimum CLK input pulse width
RT/CLK high threshold
RT/CLK low threshold
RT/CLK falling edge to SW rising edge
delay
PLL lock in time
Measured at 500 kHz with RT resistor in series
Measured at 500 kHz
0.5
R
T
= 200 kΩ
100
450
160
15
1.55
1.2
55
78
1.7
500
2500
550
2300
kHz
kHz
kHz
ns
V
V
ns
μs
176
12
°C
°C
(1)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
4.5
Rising
4.1
4.3
325
EN = 0 V, 25°C, 4.5 V
≤
VIN
≤
60 V
FB = 0.83 V, T
A
= 25°C
No voltage hysteresis, rising and falling
Enable threshold +50 mV
Enable threshold –50 mV
–0.58
–2.2
V
IN
= 12 V, T
A
= 25°C
f
SW
= 500 kHz, 10% to 90%
f
SW
= 2.5 MHz, 10% to 90%
0.792
1.1
2.25
146
60
4.48
V
V
mV
4.5
175
μA
1.2
–4.6
–1.2
–3.4
540
1.3
V
μA
μA
µs
-1.8
-4.5
2.1
0.42
ms
ms
0.8
0.808
V
VIN = 12 V, BOOT-SW = 6 V
92
190
mΩ
nA
μMhos
μMhos
V/V
kHz
μA
A/V
Error amplifier transconductance (g
M
) during
–2
μA
< I
COMP
< 2
μA,
V
COMP
= 1 V, V
FB
= 0.4 V
soft-start
Error amplifier dc gain
Min unity gain bandwidth
Error amplifier source/sink
COMP to SW current transconductance
CURRENT LIMIT
6.3
6.3
7.1
V
FB
= 0.8 V
7.5
7.5
7.5
60
8.8
8.3
7.9
ns
A
(1)
Open Loop current limit measured directly at the SW pin and is independent of the inductor value and slope compensation.
Copyright © 2013, Texas Instruments Incorporated
Product Folder Links:
5
VISHAY [ VISHAY TELEFUNKEN ]
