TPS54526_15 Datasheet, PDF (6/31 Pages) Texas Instruments – TPS54526 4.5-V to 18-V Input, 5.5-A Synchronous Step-Down Converter with Eco-mode™

TPS54526
SLVSB84C – MAY 2012 – REVISED JUNE 2014
Electrical Characteristics (continued)
over operating free-air temperature range, V_IN = 12V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
CURRENT LIMIT
I_ocl
Current limit
THERMAL SHUTDOWN
T_SDN
Thermal shutdown threshold
L_OUT = 1.5 μH⁽²⁾,
Shutdown temperature ⁽²⁾
Hysteresis ⁽²⁾
SOFT START
I_SSC
SS charge current
I_SSD
SS discharge current
POWER GOOD
V_SS = 1.0 V
V_SS = 0.5 V
V_THPG
PG threshold
V_VFB rising (good)
V_VFB falling (fault)
I_PG
PG sink current
V_PG = 0.5 V
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
V_OVP
V_UVP
Output OVP trip threshold
Output UVP trip threshold
OVP detect
UVP detect
Hysteresis
UVLO
Wake up VREG5 voltage
V_UVLO
UVLO threshold
Fall VREG5 voltage
Hysteresis VREG5 voltage
(2) Not production tested.
7.6 Timing Requirements
PARAMETER
TEST CONDITIONS
ON-TIME TIMER CONTROL
t_ON
On time
V_IN = 12 V, V_O = 1.05 V
t_OFF(MIN) Minimum off time
T_A = 25°C, V_FB = 0.7 V
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
t_OVPDEL
t_UVPDEL
t_UVPEN
Output OVP prop delay
Output UVP delay
Output UVP enable delay
Relative to soft-start time
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MIN TYP MAX UNIT
6.1 6.9 8.4 A
165
°C
35
4.2 6.0 7.8 μA
0.1 0.2
mA
85
90
95 %
85
%
2.5
5
mA
120 125 130 %
60
65
70 %
10
%
3.31 3.61 3.91
2.82 3.12 3.42 V
0.37 0.49 0.61
MIN TYP MAX UNIT
155
ns
260 330 ns
10
μs
0.25
ms
x 1.7
6
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