TPS54240_15 Datasheet, PDF (6/56 Pages) Texas Instruments – TPS54240 3.5-V to 42-V Step-Down DC - DC Converter With Eco-Mode™

TPS54240
SLVSAA6B – APRIL 2010 – REVISED NOVEMBER 2014
6.5 Electrical Characteristics
T_J = –40°C to 150°C, VIN = 3.5 to 42 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
SUPPLY VOLTAGE (VIN PIN)
Operating input voltage
Internal undervoltage lockout threshold No voltage hysteresis, rising and falling
Shutdown supply current
EN = 0 V, 25°C, 3.5 V ≤ VIN ≤ 42 V
Operating : nonswitching supply current VSENSE = 0.83 V, VIN = 12 V, 25°C
ENABLE AND UVLO (EN PIN)
Enable threshold voltage
No voltage hysteresis, rising and falling, 25°C
Input current
Enable threshold +50 mV
Enable threshold –50 mV
Hysteresis current
VOLTAGE REFERENCE
Voltage reference
T_J = 25°C
HIGH-SIDE MOSFET
On-resistance
ERROR AMPLIFIER (EA)
Input current
Error amplifier transconductance (g_M)
Error amplifier transconductance (g_M)
during slow start
Error amplifier dc gain
Error amplifier bandwidth
Error amplifier source/sink
COMP to switch current
transconductance
VIN = 3.5 V, BOOT-PH = 3 V
VIN = 12 V, BOOT-PH = 6 V
–2 μA < I_COMP < 2 μA, V_COMP = 1 V
–2 μA < I_COMP < 2 μA, V_COMP = 1 V,
V_VSENSE = 0.4 V
V_VSENSE = 0.8 V
V_(COMP) = 1 V, 100 mV overdrive
www.ti.com
MIN TYP MAX UNIT
3.5
42 V
2.5
V
1.3
4
μA
138
200
1.15 1.25 1.36 V
–3.8
μA
–0.9
–2.9
μA
0.792
0.784
0.8 0.808
V
0.8 0.816
300
mΩ
200
410
50
nA
310
μS
70
μS
10,000
V/V
2700
kHz
±27
μA
10.5
A/V
6
Submit Documentation Feedback
Product Folder Links: TPS54240
Copyright © 2010–2014, Texas Instruments Incorporated