LTC1872ES6#TRPBF Linear Technology, LTC1872ES6#TRPBF Datasheet - Page 2

• Manufacturer Part Number: LTC1872ES6#TRPBF
• Description: IC DC/DC CONTRLR STEP-UP SOT23-6
• Manufacturer: Linear Technology
• Type: Step-Up (Boost)r

Specifications of LTC1872ES6#TRPBF

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 36 V
• Frequency - Switching: 550kHz
• Voltage - Input: 2.5 ~ 9.8 V
• Operating Temperature: -65°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-6
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Power - Output: -

ABSOLUTE
(Note 1)
Input Supply Voltage (V
SENSE
V
NGATE Peak Output Current (< 10 s) ....................... 1A
Storage Ambient Temperature Range ... – 65 C to 150 C
Operating Temperature Range (Note 2) .. – 40 C to 85 C
Junction Temperature (Note 3) ............................. 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
LTC1872
range, otherwise specifications are at T
PARAMETER
Input DC Supply Current
Undervoltage Lockout Threshold
Shutdown Threshold (at I
Start-Up Current Source
Regulated Feedback Voltage
V
Oscillator Frequency
Gate Drive Rise Time
Gate Drive Fall Time
Peak Current Sense Voltage
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1872E is guaranteed to meet performance specifications
from 0 C to 70 C. Specifications over the – 40 C to 85 C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: T
dissipation P
ELECTRICAL CHARACTERISTICS
2
FB
FB
Normal Operation
Sleep Mode
Shutdown
UVLO
T
Input Current
, I
J
= T
TH
J
–
A
/RUN Voltages ..............................– 0.3V to 2.4V
, NGATE Voltages ............ – 0.3V to (V
is calculated from the ambient temperature T
+ (P
D
according to the following formula:
D
•
JA
C/W)
W
MAXIMUM
TH
/RUN)
IN
).........................– 0.3V to 10V
W W
A
= 25 C. V
RATINGS
A
CONDITIONS
Typicals at V
V
V
V
0 C to 70 C(Note 5)
– 40 C to 85 C(Note 5)
(Note 5)
V
C
C
(Note 6)
and power
U
IN
IN
ITH
FB
LOAD
LOAD
IN
2.4V V
2.4V V
2.4V V
V
IN
Falling
Rising
= 4.2V unless otherwise specified. (Note 2)
= 0.8V
/RUN = 0V
IN
< UVLO Threshold
= 3000pF
= 3000pF
+ 0.3V)
IN
IN
IN
The
IN
= 4.2V (Note 4)
9.8V
9.8V
9.8V, V
denotes specifications that apply over the full operating temperature
ITH
PACKAGE/ORDER
Consult factory for parts specified with wider operating temperature ranges.
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: The LTC1872 is tested in a feedback loop that servos V
output of the error amplifier.
Note 6: Guaranteed by design at duty cycle = 30%. Peak current sense
voltage is V
increases due to slope compensation as shown in Figure 2.
/RUN = 0V
I
TH
/RUN 1
GND 2
V
T
FB
JMAX
REF
6-LEAD PLASTIC SOT-23
3
/6.67 at duty cycle <40%, and decreases as duty cycle
= 150 C,
S6 PACKAGE
TOP VIEW
JA
= 230 C/ W
6 NGATE
5 V
4 SENSE
IN
0.780
0.770
MIN
1.55
1.85
0.15
0.25
500
114
–
INFORMATION
U
0.800
0.800
2.00
2.10
0.35
TYP
270
230
550
120
0.5
10
40
40
S6 PART MARKING
8
6
ORDER PART
LTC1872ES6
NUMBER
W
0.820
0.830
LTMK
MAX
2.35
2.40
0.55
0.85
420
370
650
22
10
50
FB
to the
UNITS
U
kHz
mV
nA
ns
ns
A
A
A
A
V
V
V
A
V
V