Datasheet

3
LTC1148
LTC1148-3.3/LTC1148-5
114835fd
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
8
– V
7
Current Sense Threshold Voltage
LTC1148, LTC1148HV, LTC1148L V
SENSE
–
= 5V, V
9
= V
OUT
/4 + 25mV (Forced) 25 mV
V
SENSE
–
= 5V, V
9
= V
OUT
/4 – 25mV (Forced) ● 130 150 170 mV
LTC1148-3.3, LTC1148HV-3.3 V
SENSE
–
= V
OUT
+ 100mV (Forced) 25 mV
LTC1148L-3.3 V
SENSE
–
= V
OUT
– 100mV (Forced) ● 130 150 170 mV
LTC1148-5, LTC1148HV-5 V
SENSE
–
= V
OUT
+ 100mV (Forced) 25 mV
V
SENSE
–
= V
OUT
– 100mV (Forced) ● 130 150 170 mV
V
10
Shutdown Pin Threshold 0.5 0.8 2 V
I
10
Shutdown Pin Input Current 0V < V
SHUTDOWN
< 8V, V
IN
= 16V 1.2 5 µA
I
4
C
T
Pin Discharge Current V
OUT
in Regulation, V
SENSE
–
= V
OUT
50 70 90 µA
V
OUT
= 0V 2 10 µA
t
OFF
Off Time (Note 5) C
T
= 390pF, I
LOAD
= 700mA 4 5 6 µs
t
R
, t
F
Driver Output Transition Times C
L
= 3000pF (Pins 1, 14), V
IN
= 6V 100 200 ns
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
9
Feedback Voltage (LTC1148, LTC1148HV V
IN
= 9V 1.20 1.25 1.30 V
LTC1148L)
∆V
OUT
Regulated Output Voltage V
IN
= 9V
LTC1148-3.3, LTC1148HV-3.3, LTC1148L-3.3 I
LOAD
= 700mA 3.17 3.33 3.43 V
LTC1148-5, LTC1148HV-5 I
LOAD
= 700mA 4.85 5.05 5.20 V
I
Q
Input DC Supply Current (Note 3) (Note 7)
LTC1148 Series
Normal Mode 4V < V
IN
< 12V 1.6 2.4 mA
Sleep Mode 4V < V
IN
< 12V 160 260 µA
Sleep Mode 6V < V
IN
< 12V 160 260 µA
Shutdown V
SHUTDOWN
= 2.1V, 4V < V
IN
< 12V 10 22 µA
LTC1148HV Series
Normal Mode 4V < V
IN
< 18V 1.6 2.6 mA
Sleep Mode 4V < V
IN
< 18V 160 280 µA
Sleep Mode 6V < V
IN
< 18V 160 280 µA
Shutdown V
SHUTDOWN
= 2.1V, 4V < V
IN
< 18V 10 24 µA
LTC1148L Series
Normal Mode 3.5V < V
IN
< 12V 1.6 2.4 mA
Sleep Mode 3.5V < V
IN
< 12V 160 260 µA
Shutdown V
SHUTDOWN
= 2.1V, 3.5V < V
IN
< 12V 10 22 µA
V
8
– V
7
Current Sense Threshold Voltage
LTC1148, LTC1148HV, LTC1148L (Note 4) V
SENSE
–
= 5V, V
9
= V
OUT
/4 – 25mV (Forced) 25 mV
V
SENSE
–
= 5V, V
9
= V
OUT
/4 + 25mV (Forced) 125 150 175 mV
LTC1148-3.3, LTC1148HV-3.3, LTC1148L-3.3 V
SENSE
–
= V
OUT
+ 100mV (Forced) 25 mV
V
SENSE
–
= V
OUT
– 100mV (Forced) 125 150 175 mV
LTC1148-5, LTC1148HV-5 V
SENSE
–
= V
OUT
+ 100mV (Forced) 25 mV
V
SENSE
–
= V
OUT
– 100mV (Forced) 125 150 175 mV
V
10
Shutdown Pin Threshold 0.55 0.8 2 V
t
OFF
Off Time (Note 5) C
T
= 390pF, I
LOAD
= 700mA 3.8 5 6 µs
–40°C ≤ T
A
≤ 85°C (Note 5), V
IN
= 10V, unless otherwise noted.
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
SHUTDOWN
= 0V unless otherwise noted.
E
LECTR
IC
AL C CHARA TERIST
ICS