Texas Instruments 0A Evaluation Module Featuring the TPS51117 Synchronous Buck Controller with D-CAP Mode TPS51117EVM TPS51117EVM 数据表
产品代码
TPS51117EVM
SLVS631B – DECEMBER 2005 – REVISED SEPTEMBER 2009
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ELECTRICAL CHARACTERISTICS (Continued)
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INTERNAL BST DIODE
V
FBST
Forward voltage
V
V5DRV-VBST
, IF = 10 mA, T
A
= 25°C
0.7
0.8
0.9
V
I
VBSTLK
VBST leakage current
VBST = 34 V, LL = 28 V
0.1
1
μ
A
UVLO/LOGIC THRESHOLD
Wake up
3.7
3.9
4.1
V
V
UVLO
V5FILT UVLO Threshold
Hysteresis
200
300
400
mV
EN_PSV low
0.7
1.0
1.3
V
Hysteresis
150
200
250
mV
EN_PSV logic input
V
EN_PSV
EN_PSV float (set PWM_only mode)
1.7
1.95
2.25
V
voltage
EN_PSV high (set Auto_skip mode)
2.4
2.65
2.9
V
Hysteresis
100
175
250
mV
I
EN_PSV
EN_PSV source current
EN_PSV = GND, absolute value
(1)
1
μ
A
POWERGOOD COMPARATOR
PG in from lower (PGOOD goes high)
92.5%
95%
97.5%
PG low hysteresis (PGOOD goes low)
–4%
–5.5%
–7%
V
THPG
PG threshold
PG in from higher (PGOOD goes high)
102%
105%
107%
PG high hysteresis (PGOOD goes low)
4%
5.5%
7%
I
PGMAX
PG sink current
PGOOD = 0.5 V
2.5
7.5
mA
T
PGDEL
PG delay
Delay for PGOOD in
45
63
85
μ
s
CURRENT SENSE
I
TRIP
TRIP source current
V
TRIP
< 0.3 V, T
A
= 25°C
9
10
11
μ
A
ITRIP temperature
T
CITRIP
On the basis of 25°C
4500
ppm/°C
coefffecient
Current limit threshold
V
Rtrip
V
TRIP-GND
voltage
(1)
, all temperatures
30
200
mV
range setting range
Overcurrent limit
V
OCLoff
(V
TRIP-GND
-V
PGND-LL
) voltage V
TRIP-GND
= 60 mV
–10
0
10
mV
comparator offset
Negative overcurrent limit
(V
TRIP-GND
-V
LL-PGND
) voltage V
TRIP-GND
= 60 mV,
V
UCLoff
–9.5
0.5
10.5
mV
comparator offset
EN_PSV = float
Zero crossing comparator
V
ZCoff
V
PGND-LL
voltage, EN_PSV = 3.3 V
–9.5
0.5
10.5
mV
offset
UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
V
OVP
VFB OVP trip threshold
OVP detect
111%
115%
119%
VFB OVP propagation
T
OVPDEL
See
(1)
1.5
μ
s
delay
UVP detect
65%
70%
75%
V
UVP
VFB UVP trip threshold
Hysteresis
10%
T
UVPDEL
VFB UVP delay
22
32
42
μ
s
T
UVPEN
UVP enable delay
After 1.7 × T
SS
, UVP protection engaged
1.4
2
2.6
ms
THERMAL SHUTDOWN
Shutdown temperature
(1)
160
°C
Thermal shutdown
T
SDN
threshold
Hysteresis
(1)
12
°C
(1)
Ensured by design. Not production tested.
4
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