2
LTC1266
LTC1266 -3.3/LTC1266 -5
(Note 1)
Input Supply Voltage (Pins 2, 5)............... 20V to –0.3V
Continuous Output Current (Pins 1, 16) .............. 50mA
Sense Voltages (Pins 8, 9) ....................... 13V to –0.3V
SHDN Voltage (Pin 11) ............................. 12V to –0.3V
PINV, BINH, LB
IN
(Pins 3, 4, 13)................20V to –0.3V
LB
OUT
Output Current ........................................... 12mA
Operating Ambient Temperature Range...... 0°C to 70°C
Industrial Temperature Range ................ –40°C to 85°C
Extended Commercial
Temperature Range ........................... –40°C to 85°C
Junction Temperature (Note 2)............................ 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
ORDER PART
NUMBER
LTC1266CS
LTC1266CS-3.3
LTC1266CS-5
LTC1266ACS
LTC1266IS
LTC1266IS-3.3
LTC1266IS-5
LTC1266AIS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
FB
Feedback Voltage V
IN
= 9V, I
LOAD
= 700mA, V
PINV
= V
PWR
= 14V,
Topside Switch = N-Ch
LTC1266ACS
● 1.252 1.265 1.278 V
LTC1266CS ● 1.210 1.265 1.290 V
I
FB
Feedback Current (LTC1266 Only) ● 0.2 1 µA
V
OUT
Regulated Output Voltage V
IN
= 9V, I
LOAD
= 700mA, V
PINV
= V
PWR
= 14V,
Topside Switch = N-Ch
LTC1266CS-3.3
● 3.23 3.33 3.43 V
LTC1266CS-5 ● 4.90 5.05 5.20 V
Output Ripple (Burst Mode Operation) I
LOAD
= 150mA 50 mV
P-P
∆V
OUT
Output Voltage Line Regulation I
LOAD
= 50mA
V
PINV
= 0V, Topside Switch = P-Ch, V
IN
= 7V to 12V – 40 0 40 mV
V
PINV
= V
PWR
, Topside Switch = N-Ch, V
IN
= 7V to 12V – 40 0 40 mV
Output Voltage Load Regulation 5mA < I
LOAD
< 2A, R
SENSE
= 0.05Ω
LTC1266-3.3 Burst Mode Operation Enabled, V
BINH
= 0V ● 40 65 mV
LTC1266-3.3 Burst Mode Operation Inhibited, V
BINH
= 2V ● 15 25 mV
LTC1266-5 Burst Mode Operation Enabled, V
BINH
= 0V ● 60 100 mV
LTC1266-5 Burst Mode Operation Inhibited, V
BINH
= 2V ● 25 40 mV
I
Q1
V
IN
Pin DC Supply Current (Note 3)
Normal Mode 3.5V < V
IN
< 18V 2.1 3.0 mA
Sleep Mode 3.5V < V
IN
< 18V 170 250 µA
Shutdown V
SHDN
= 2.1V, 3.5V < V
IN
< 18V 25 50 µA
I
Q2
PWR V
IN
DC Supply Current (Note 3)
Normal Mode 3.5V < PWR V
IN
< 18V 20 40 µA
Sleep Mode 3.5V < PWR V
IN
< 18V 1 5 µA
Shutdown V
SHDN
= 2.1V, 3.5V < PWR V
IN
< 18V 1 5 µA
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
SHDN
= V
BINH
= 0V unless otherwise noted.
T
JMAX
= 125°C,
θ
JA
= 110°C/W
Consult factory for Industrial and Military grade parts.
TOP VIEW
*FIXED OUTPUT VERSIONS
S PACKAGE
16-LEAD PLASTIC SO
TDRIVE
PWR V
IN
PINV
BINH
V
IN
C
T
I
TH
SENSE
–
BDRIVE
PGND
LB
OUT
LB
IN
SGND
SHDN
V
FB
(NC*)
SENSE
+
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
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ELECTRICAL CHARACTERISTICS