LTC1771
ABSOLUTE
AXI U
RATI GS
(Note 1)
Junction Temperature (Note 2) ............................ 125°C
Operating Temperature Range (Note 3)
LTC1771E ......................................... – 40°C to 85°C
LTC1771I ......................................... – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
Input Supply Voltage (V
IN
)........................ – 0.3V to 20V
Peak Driver Output Current < 10µs (PGATE) ............. 1A
RUN/SS Voltage ........................... – 0.3V to (V
IN
+ 0.3V)
MODE Voltage .......................................... – 0.3V to 20V
I
TH
, V
FB
Voltage .......................................... – 0.3V to 5V
SENSE Voltage (V
IN
> 12V)...(V
IN
– 12V) to (V
IN
+ 0.3V)
SENSE Voltage (V
IN
≤
12V) .......... – 0.3V to (V
IN
+ 0.3V)
PACKAGE/ORDER I FOR ATIO
TOP VIEW
RUN/SS
I
TH
V
FB
GND
1
2
3
4
8
7
6
5
MODE
SENSE
V
IN
PGATE
ORDER PART
NUMBER
LTC1771EMS8
MS8 PART MARKING
LTKD
RUN/SS 1
I
TH
2
V
FB
3
GND 4
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 150°C/ W
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
The
q
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
V
IN
= 10V, V
RUN
= open unless otherwise specified.
SYMBOL
V
FB
I
FB
I
SUPPLY
∆V
LINEREG
∆V
LOADREG
I
Q
PARAMETER
Feedback Voltage
Feedback Current
No-Load Supply Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
Input DC Supply Current
Active Mode (PGATE = 0V)
Sleep Mode (Note 6)
Shutdown
Short Circuit
Maximum Current Sense Threshold
Minimum Current Sense Threshold
Sleep Current Sense Threshold
Switch Off Time
Mode Pin Threshold
CONDITIONS
(Note 5)
(Note 5)
V
IN
= 10V, I
LOAD
= 0 (Note 6)
V
IN
= 5V to 15V (Note 5)
I
TH
= 0.5V to 2V, Burst Disabled (Note 5)
(Note 4)
V
IN
= 2.8V to 18V
V
IN
= 2.8V to 18V, V
FB
= 1.5V
V
IN
= 2.8V to 18V, V
RUN
= 0V
V
IN
= 2.8V to 18V, V
FB
= 0V
V
FB
= V
REF
– 20mV
V
FB
= V
REF
+ 10mV, Burst Disabled
I
TH
= 1V
V
FB
at Regulated Value
V
FB
= 0V
V
MODE
Rising
q
q
q
q
q
q
∆V
SENSE(MAX)
∆V
SENSE(MIN)
∆V
SENSE(SLEEP)
t
OFF
V
MODE
2
U
U
W
W W
U
W
TOP VIEW
8
7
6
5
MODE
SENSE
V
IN
PGATE
ORDER PART
NUMBER
LTC1771ES8
LTC1771IS8
S8 PART MARKING
1771
1771I
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 125°C,
θ
JA
= 110°C/ W
MIN
1.205
TYP
1.230
1
10
0.003
0.25
150
9
2
175
MAX
1.255
10
0.03
1
235
15
6
275
180
UNITS
V
nA
µA
%/V
%
µA
µA
µA
µA
mV
mV
mV
µs
µs
110
140
– 25
50
3.5
70
0.5
1.3
2
V
LINER [ LINEAR TECHNOLOGY ]
