Linear Technology LTC4260, Техническое описание

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LTC4260
3
4260fc
For more information www.linear.com/LTC4260
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
General
V
DD
Input Supply Range
l
8.5 80 V
I
DD
Input Supply Current
l
2 5 mA
V
DD(UVL)
V
DD
Supply Undervoltage Lockout V
DD
Falling
l
7 7.45 7.9 V
INTV
CC(UVL)
V
CC
Supply Undervoltage Lockout INTV
CC
Falling
l
3.4 3.8 4.2 V
INTV
CC
Internal Regulator Voltage
l
5 5.5 6 V
Gate Drive
t
D
Turn-On Delay
l
50 100 150 ms
ΔV
GATE
External N-Channel Gate Drive
(V
GATE
– V
SOURCE
)
V
DD
= 20V to 80V
V
DD
= 8.5V to 20V
l
l
10
4.5
14
6
18
18
V
V
I
GATE(UP)
External N-Channel Pull-Up Current Gate Drive On, V
GATE
= 0V
l
–14 –18 –22 µA
I
GATE(FST)
External N-Channel Fast Pull-Down Fast Turn Off, V
GATE
= 48V, V
SOURCE
= 43V
l
300 600 1000 mA
I
GATE(DN)
External N-Channel Pull-Down Current Gate Drive Off, V
GATE
= 58V, V
SOURCE
= 48V
l
0.7 1 1.4 mA
I
SOURCE
SOURCE Pin Input Current SOURCE = 48V
l
200 400 600 µA
Input Pins
V
ON(TH)
ON Pin Threshold Voltage V
ON
Rising
l
1.19 1.235 1.27 V
ΔV
ON(HYST)
ON Pin Hysteresis
l
60 130 200 mV
I
ON(IN)
ON Pin Input Current V
ON
= 1.2V
l
0 ±1 µA
V
OV(TH)
OV Pin Threshold Voltage V
OV
Rising
l
3.43 3.5 3.56 V
ΔV
OV(HYST)
OV Pin Hysteresis
l
70 90 120 mV
I
OV(IN)
OV Pin Input Current V
OV
= 3.5V
l
0 ±1 µA
V
UV(TH)
UV Pin Threshold Voltage V
UV
Rising
l
3.43 3.5 3.56 V
ΔV
UV(HYST)
UV Pin Hysteresis
l
310 380 440 mV
I
UV(IN)
UV Pin Input Current V
UV
= 3.5V
l
0 ±2 µA
V
UV(RTH)
UV Pin Reset Threshold Voltage V
UV
Falling
l
1.18 1.235 1.27 V
ΔV
UV(RHYST)
UV Pin Reset Threshold Hysteresis
l
80 160 250 mV
ΔV
SENSE(TH)
Current Limit Sense Voltage Threshold
(V
DD
– V
SENSE
)
V
FB
= 3.5V
V
FB
= 0V
l
l
45
10
50
20
55
30
mV
mV
I
SENSE(IN)
SENSE Pin Input Current V
SENSE
= 48V
l
70 100 130 µA
V
FB
Foldback Pin Power Good Threshold FB Rising
l
3.43 3.5 3.56 V
ΔV
FB(HYST)
FB Pin Power Good Hysteresis
l
80 100 120 mV
I
FB
Foldback Pin Input Current FB = 3.5V
l
0 ±2 µA
V
BD_PRST(TH)
BD_PRST Input Threshold V
BD_PRST
Rising
l
1.2 1.235 1.27 V
ΔV
BD_PRST(HYST)
BD_PRST Hysteresis
l
70 130 190 mV
I
BD_PRST
BD_PRST Pullup Current BD_PRST = 0V
l
–7 –10 –16 µA
V
GPIO(TH)
GPIO Pin Input Threshold V
GPIO
Rising
l
1.6 1.8 2 V
ΔV
GPIO(HYST)
GPIO Pin Hysteresis 80 mV
V
GPIO(OL)
GPIO Pin Output Low Voltage I
GPIO
= 2mA
l
0.25 0.5 V
I
GPIO(IN)
GPIO Pin Input Leakage Current V
GPIO
= 80V
l
0 ±10 µA
R
ADIN
ADIN Pin Input Resistance V
ADIN
= 1.28V
l
2 10 MΩ
I
ADIN
ADIN Pin Input Current V
ADIN
= 2.56V
l
0 ±1 µA
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= 48V, unless otherwise noted.