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| TPS53355_15 Datasheet, PDF (6/37 Pages) Texas Instruments – TPS53355 High-Efficiency 30-A Synchronous Buck Converter With Eco-mode™ | |||
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TPS53355
SLUSAE5B â AUGUST 2011 â REVISED JANUARY 2015
www.ti.com
Electrical Characteristics (continued)
Over recommended free-air temperature range, VVDD= 12 V (unless otherwise noted)
PARAMETER
CONDITIONS
POWERGOOD
VTHPG
PG threshold
PG in from lower
PG in from higher
PG hysteresis
RPG
PG transistor on-resistance
tPGDEL
PG delay
Delay for PG in
LOGIC THRESHOLD AND SETTING CONDITIONS
VEN
EN Voltage
Enable
Disable
IEN
EN Input current
fSW
Switching frequency
PROTECTION: CURRENT SENSE
VEN = 5 V
RRF = 0 Ω to GND, TA = 25°C(2)
RRF = 187 kΩ to GND, TA = 25°C(2)
RRF = 619 kΩ, to GND, TA = 25°C(2)
RRF = Open, TA= 25°C(2)
RRF = 866 kΩ to VREG, TA = 25°C(2)
RRF = 309 kΩ to VREG, TA = 25°C(2)
RRF = 124 kΩ to VREG, TA = 25°C(2)
RRF = 0 Ω to VREG, TA = 25°C(2)
ITRIP
TCITRIP
VTRIP
VOCL
VOCLN
VAZCADJ
TRIP source current
TRIP current temperature coeffficient
Current limit threshold setting range
Current limit threshold
Negative current limit threshold
Auto zero cross adjustable range
VTRIP = 1 V, TA = 25°C
On the basis of 25°C(1)
VTRIP-GND
VTRIP = 2.4 V
VTRIP = 0.4 V
VTRIP = 2.4 V
VTRIP = 0.4 V
Positive
Negative
PROTECTION: UVP and OVP
VOVP
tOVPDEL
VUVP
tUVPDEL
tUVPEN
UVLO
OVP trip threshold
OVP proprogation delay
Output UVP trip threshold
Output UVP proprogation delay
Output UVP enable delay
OVP detect
VFB delay with 50-mV overdrive
UVP detect
From enable to UVP workable
VUVVREG
VREG UVLO threshold
Wake up
Hysteresis
THERMAL SHUTDOWN
TSDN
Thermal shutdown threshold
Shutdown temperature(1)
Hysteresis (1)
MIN
92.5%
107.5%
2.5%
15
0.8
1.8
200
250
350
450
580
670
770
880
9.4
0.4
68.5
7.5
-315
-58
3
115%
65%
0.8
1.8
4.00
TYP MAX UNIT
95.0% 98.5%
110.0% 112.5%
5.0% 7.5%
30
55 Ω
1
1.2 ms
V
0.6
1.0 µA
250
300 kHz
300
350
400
450
500
550
650
720
750
820
850
930
970 1070
10.0
4700
75.0
12.5
-300
-50
15
â15
10.6 µA
ppm/°C
2.4 V
81.5 mV
17.5
-285 mV
-42
mV
â3
120% 125%
1
µs
70% 75%
1.0
1.2 ms
2.6
3.2 ms
4.20 4.33 V
0.25
145
°C
10
(2) Not production tested. Test condition is VIN= 12 V, VOUT= 1.1 V, IOUT = 10 A using application circuit shown in Figure 47.
6
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