Datasheet
TPS54062
www.ti.com
SLVSAV1B –MAY 2011–REVISED AUGUST 2012
ELECTRICAL CHARACTERISTICS
(1)
TEST CONDITIONS: T
J
= –40°C to 125°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 1.7 µA
Iq Operating – Non switching VSENSE = 0.9V, VIN = 12V 89 110 µA
ENABLE AND UVLO (EN PIN)
Rising 1.24 1.4 V
Enable threshold
Falling 1 1.14 V
Enable threshold +50 mV –4.7 µA
Input current
Enable threshold –50 mV –1.2 µA
Hysteresis 3.5 µA
Enable to start switching time 450 µs
VIN
VIN start voltage VIN rising 4.53 V
VOLTAGE REFERENCE
Voltage reference 1mA < I
OUT
< Minimum Current Limit 0.784 0.8 0.816 V
HIGH-SIDE MOSFET
Switch resistance BOOT-PH = 5.7V 1.5 2.8 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 102 µMhos
EA gm during slow start –2µA < I
(COMP)
< 2µA, V
(COMP)
= 1V, VSENSE = 0.4V 26 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 0.65 A/V
CURRENT LIMIT
High side sourcing current limit
VIN = 12V BOOT-PH = 5.7V 75 134 mA
threshold
Zero cross detect current –0.7 mA
THERMAL SHUTDOWN
Thermal shutdown 146 C
RT/CLK
Operating frequency using RT mode 100 400 kHz
Switching frequency R
(RT/CLK)
= 510kΩ 192 240 288 kHz
Minimum CLK pulse width 40 ns
RT/CLK voltage R
(RT/CLK)
= 510kΩ 0.53 V
RT/CLK high threshold 1.3 V
RT/CLK low threshold 0.5 V
RT/CLK falling edge to PH rising
Measure at 240 kHz with RT resistor in series 100 200 ns
edge delay
PLL lock in time Measure at 240 kHz 100 µs
PLL frequency range 300 400 kHz
(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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