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