Datasheet
TPS53315
www.ti.com
SLUSAE6 –DECEMBER 2010
ELECTRICAL CHARACTERISTICS
Over recommended free-air temperature range, VDD = 12 V (Unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
LOGIC THRESHOLD AND SETTING CONDITIONS
Enable 1.8 V
V
EN
EN voltage threshold
Disable 0.6
I
EN
EN input current V
EN
= 5 V 1.0 µA
R
RF
= 0 Ω to GND, T
A
= 25°C
(1)
200 250 300
R
RF
= 187 kΩ to GND, T
A
= 25°C
(1)
250 300 350
R
RF
= 619 kΩ to GND, T
A
= 25°C
(1)
350 400 450
R
RF
= Open, T
A
= 25°C
(1)
450 500 550
f
SW
Switching frequency kHz
R
RF
= 866 kΩ to VREG, T
A
= 25°C
(1)
580 650 720
R
RF
= 309 kΩ to VREG, T
A
= 25°C
(1)
670 750 820
R
RF
= 124 kΩ to VREG, T
A
= 25°C
(1)
770 850 930
R
RF
= 0 Ω to VREG, T
A
= 25°C
(1)
880 970 1070
PROTECTION: CURRENT SENSE
I
TRIP
TRIP source current V
TRIP
= 1 V, T
A
= 25°C 9.4 10.0 10.6 µA
TC
ITRIP
TRIP current temperature coefficent On the basis of 25°C
(2)
4700 ppm/°C
V
TRIP
Current limit threshold setting range V
TRIP-GND
voltage 0.2 1.2 V
V
TRIP
= 1.2 V 140 150 160
V
OCL
Current limit threshold
V
TRIP
= 0.2 19 26 33
mV
V
TRIP
= 1.2 V –160 –150 –140
V
OCLN
Negative current limit threshold
V
TRIP
= 0.2 V –33 –26 –19
Positive 3 15
V
AZCADJ
Auto zero cross adjustable range mV
Negative –15 –3
PROTECTION: UVP and OVP
V
OVP
OVP trip threshold OVP detect 115% 120% 125%
t
OVPDEL
OVP propagation delay time VFB delay with 50-mV overdrive 1 µs
V
UVP
Output UVP trip threshold time UVP detect 65% 70% 75%
t
UVPDEL
Output UVP propagation delay time 0.8 1 1.2 ms
t
UVPEN
Output UVP enable delay time from EN to UVP workable, R
MODE
= 39 kΩ 2.0 2.6 3.2 ms
UVLO
Wake up 4.00 4.20 4.32
V
UVVREG
VREG UVLO threshold V
Hysteresis 0.25
THERMAL SHUTDOWN
Shutdown temperature
(2)
145
T
SDN
Thermal shutdown threshold °C
Hysteresis
(2)
10
(1) Not production tested. Test condition is V
IN
= 12 V, V
OUT
= 1.1 V, I
OUT
= 5 A using application circuit shown in Figure 33.
(2) Ensured by design. Not production tested.
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