LTC1771I Linear Technology, LTC1771I Datasheet - Page 2

• Manufacturer Part Number: LTC1771I
• Description: Low Quiescent Current High Efficiency Step-Down DC/DC Controller
• Manufacturer: Linear Technology

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