Datasheet
TPS54061
www.ti.com
SLVSBB7C –MAY 2012–REVISED JANUARY 2014
ELECTRICAL CHARACTERISTICS
(1)
TEST CONDITIONS: T
J
= –40°C to 150°C, VIN = 4.7 To 60 V ( (unless otherwise noted)
PARAMETER CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE (VIN PIN)
Operating input voltage VIN 4.7 60 V
Shutdown supply current EN = 0V 1.4 µA
Iq Operating – Non switching VSENSE = 0.9V, VIN = 12V 90 110 µA
ENABLE AND UVLO (EN PIN)
Rising 1.23 1.4 V
Enable threshold
Falling 1 1.18 V
Enable threshold +50 mV –4.7 µA
Input current
Enable threshold –50 mV –1.2 µA
Hysteresis –3.5 µA
Enable high to start switching time 450 µs
VIN
VIN start voltage VIN rising 4.5 V
VOLTAGE REFERENCE
T
J
= 25°C, VIN = 12 V 0.792 0.8 0.808
Voltage reference V
1mA < I
OUT
< Minimum Current Limit 0.784 0.8 0.816
HIGH-SIDE MOSFET
Switch resistance BOOT-PH = 5.7V 1.5 3.0 Ω
LOW-SIDE MOSFET
Switch resistance VIN = 12V 0.8 1.5 Ω
ERROR AMPLIFIER
Input Current VSENSE pin 20 nA
Error amp gm –2µA < I
(COMP)
< 2µA, V
(COMP)
= 1V 108 µMhos
EA gm during slow start –2µA < I
(COMP)
< 2µA, V
(COMP)
= 1V, VSENSE = 0.4V 27 µMhos
Error amp dc gain VSENSE = 0.8V 1000 V/V
Min unity gain bandwidth 0.5 MHz
Error amp source/sink V
(COMP)
= 1V, 100 mV Overdrive ±8 µA
Start Switching Threshold 0.57 V
COMP to Iswitch gm 1.0 A/V
CURRENT LIMIT
High side sourcing current limit
BOOT-PH = 5.7V 250 350 500 mA
threshold
Zero cross detect current –1.1 mA
THERMAL SHUTDOWN
Thermal shutdown 176 C
RT/CLK
Operating frequency using RT mode 50 1100 kHz
Switching frequency R
(RT/CLK)
= 120kΩ 425 472 520 kHz
Minimum CLK pulsewidth 40 ns
RT/CLK voltage R
(RT/CLK)
= 120kΩ 0.53 V
RT/CLK high threshold 1.8 V
RT/CLK low threshold 0.5 V
RT/CLK falling edge to PH rising
Measure at 500 kHz with RT resistor 60 ns
edge delay
PLL lock in time Measure at 500 kHz 100 µs
(1) The Electrical Ratings specified in this section will apply to all specifications in this document unless otherwise noted. These
specifications will be interpreted as conditions that will not degrade the device’s parametric or functional specifications for the life of the
product containing it.
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