LTC1159CG#TR Linear Technology, LTC1159CG#TR Datasheet - Page 3

• Manufacturer Part Number: LTC1159CG#TR
• Description: IC REG SW STPDWN SYNC ADJ 20SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1159CG#TR

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: Adjustable
• Current - Output: 50mA
• Frequency - Switching: 250kHz
• Voltage - Input: 4 ~ 40 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

– 40 C T
temperature range, otherwise specifications are at T
SYMBOL
V
V
V
V
V
V
V
I
I
t
t
SYMBOL
V
V
I
I
V
V
V
V
t
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: T
dissipation P
ELECTRICAL C
V
SHDN2
CT
OFF
r
IN
EXTVCC
OFF
CC
EXT
P-GATE
SENSE +
SENSE
SNDN1
SHDN2
, t
FB
OUT
CC
SENSE
SENSE
SHDN2
LTC1159CG, LTC1159CG-3.3, LTC1159CG-5: T
LTC1159CN, LTC1159CN-3.3, LTC1159CN-5: T
LTC1159CS, LTC1159CS-3.3, LTC1159CS-5: T
IN
f
– V
– V
–
+
–
CC
– V
CC
–
–
J
is calculated from the ambient temperature T
IN
A
D
according to the following formulas:
85 C (Note 6)
PARAMETER
Internal Regulator Voltage
V
EXTV
P-Gate to Source Voltage (Off)
Current Sense Threshold Voltage
SHDN1 Threshold
LTC1159CG, LTC1159-3.3, LTC1159-5
SHDN2 Threshold
Shutdown 2 Input Current
C
Off-Time (Note 5)
Driver Output Transition Times
PARAMETER
Feedback Voltage (LTC1159 Only)
Regulated Output Voltage
V
EXTV
Internal Regulator Voltage
Current Sense Threshold Voltage
SHDN2 Threshold
Off-Time (Note 5)
CC
T
IN
Pin Discharge Current
LTC1159
LTC1159-3.3
LTC1159-5
LTC1159-3.3
LTC1159-5
Normal
Shutdown
Pin Current (Note 4)
Dropout Voltage
CC
CC
Switch Drop
Pin Current (Note 4)
HARA TERISTICS
C
J
J
J
= T
= T
= T
A
A
A
+ (P
+ (P
+ (P
A
V
V
and power
CONDITIONS
V
V
V
V
V
V
V
V
V
V
V
V
C
C
CONDITIONS
V
I
I
V
V
V
V
EXTV
V
Low Threshold (Forced)
High Threshold (Forced)
C
IN
IN
LOAD
LOAD
IN
IN
IN
SENSE
SENSE –
SENSE
SENSE
SENSE
SENSE
SHDN2
OUT
OUT
T
L
IN
IN
IN
IN
IN
IN
T
D
D
D
A
= 12V to 40V, EXTV
= 4V, EXTV
= 390pF, I
= 3000pF (Pins P-Drive and N-Gate), V
= 390pF, I
• 110 C/W)
• 135 C/W)
• 80 C/W)
= 12V to 40V, EXTV
= 12V, EXTV
= 12V
= 40V
= 9V
= 12V, EXTV
= 40V, EXTV
= 12V, V
= 40V, V
= 25 C. V
CC
in Regulation
= 0V
= 700mA
= 700mA
–
–
–
–
–
= 5V
= 5V, Sleep Mode
= 5V, V
= 5V, V
= 3.4V (Forced)
= 3.1V (Forced)
= 5.2V (Forced)
= 4.7V (Forced)
The
SHDN2
SHDN2
LOAD
LOAD
CC
IN
FB
FB
CC
CC
CC
= Open, I
denotes specifications which apply over the full operating
= 12V, V
= 700mA, V
= 700mA, V
= 1.32V (Forced)
= 1.15V (Forced)
= 2V
= 2V
= 5V, I
= 5V
= 5V
Note 3: On LTC1159 versions which have a SHDN1 pin, it must be at
ground potential for testing.
Note 4: The LTC1159 V
MOSFET driver currents. When V
EXTV
See Typical Performance Characteristics and Applications Information.
Note 5: In applications where R
time increases approximately 40%.
CC
CC
= 0V, I
SWITCH
CC
= 0V, I
CC
SHDN1
= 10mA
, the input current increases by (I
IN
IN
CC
= 10V
= 10V
CC
= 10mA
= 0V (Note 3), unless otherwise noted.
= 10mA
= 10mA
IN
LTC1159-3.3/LTC1159-5
= 6V
IN
and EXTV
SENSE
CC
CC
power is derived from the output via
– 0.2
– 0.2
4.25
3.17
4.85
MIN
MIN
130
130
130
125
0.5
0.8
1.2
0.8
3.5
is placed at ground potential, the off-
50
current measurements exclude
4
GATECHG
1.25
3.30
5.05
TYP
TYP
300
250
150
150
150
100
200
300
250
150
4.5
0.8
1.4
4.5
1.4
25
25
25
12
70
15
25
25
• Duty Cycle)/(Efficiency).
0
0
2
5
5
LTC1159
MAX
4.75
MAX
3.43
5.25
400
350
170
170
170
200
175
1.3
6.5
20
90
10
2
2
6
2
UNITS
UNITS
3
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
ns
V
V
V
V
V
A
A
A
V
V
V
A
A
A
A
A
V
V
s
s