Datasheet

TPS54560
www.ti.com SLVSBN0A –MARCH 2013–REVISED MARCH 2014
7.5 Electrical Characteristics
T
J
= –40°C to 150°C, VIN = 4.5 to 60V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE (VIN TERMINAL)
Operating input voltage 4.5 60 V
Internal undervoltage lockout threshold Rising 4.1 4.3 4.48 V
Internal undervoltage lockout threshold
325 mV
hysteresis
Shutdown supply current EN = 0 V, 25°C, 4.5 V ≤ VIN ≤ 60 V 2.25 4.5
μA
Operating: nonswitching supply current FB = 0.9 V, T
A
= 25°C 146 175
ENABLE AND UVLO (EN TERMINAL)
Enable threshold voltage No voltage hysteresis, rising and falling 1.1 1.2 1.3 V
Enable threshold +50 mV –4.6
Input current μA
Enable threshold –50 mV –0.58 –1.2 -1.8
Hysteresis current –2.2 –3.4 -4.5 μA
VOLTAGE REFERENCE
Voltage reference 0.792 0.8 0.808 V
HIGH-SIDE MOSFET
On-resistance VIN = 12 V, BOOT-SW = 6 V 92 190 mΩ
ERROR AMPLIFIER
Input current 50 nA
Error amplifier transconductance (g
M
) –2 μA < I
COMP
< 2 μA, V
COMP
= 1 V 350 μMhos
Error amplifier transconductance (g
M
) during
–2 μA < I
COMP
< 2 μA, V
COMP
= 1 V, V
FB
= 0.4 V 77 μMhos
soft-start
Error amplifier dc gain V
FB
= 0.8 V 10,000 V/V
Min unity gain bandwidth 2500 kHz
Error amplifier source/sink V
(COMP)
= 1 V, 100 mV overdrive ±30 μA
COMP to SW current transconductance 17 A/V
CURRENT LIMIT
All VIN and temperatures, Open Loop
(1)
6.3 7.5 8.8
Current limit threshold All temperatures, VIN = 12 V, Open Loop
(1)
6.3 7.5 8.3 A
VIN = 12 V, T
A
= 25°C, Open Loop
(1)
7.1 7.5 7.9
THERMAL SHUTDOWN
Thermal shutdown 176 °C
Thermal shutdown hysteresis 12 °C
TIMING RESISTOR AND EXTERNAL CLOCK (RT/CLK TERMINAL)
Switching frequency range using RT mode 100 2500 kHz
f
SW
Switching frequency R
T
= 200 kΩ 450 500 550 kHz
Switching frequency range using CLK mode 160 2300 kHz
Minimum CLK input pulse width 15 ns
RT/CLK high threshold 1.55 2 V
RT/CLK low threshold 0.5 1.2 V
(1) Open Loop current limit measured directly at the SW terminal and is independent of the inductor value and slope compensation.
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