LTC1875EGN Linear Technology, LTC1875EGN Datasheet - Page 3

• Manufacturer Part Number: LTC1875EGN
• Description: IC REG STEP-DWN SYNC 1.5A 16SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1875EGN

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 6 V
• Current - Output: 1.5A
• Frequency - Switching: 550kHz
• Voltage - Input: 2.65 ~ 6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

ELECTRICAL CHARACTERISTICS
SYMBOL
V
I
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1875E is guaranteed to meet specified performance 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
TYPICAL PERFOR A CE CHARACTERISTICS
temperature range, otherwise specifications are T
RUN
RUN
300
250
200
150
100
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
50
LTC1875: T
0
0
–50
–50
DC Supply Current
vs Temperature
R
V
DS(ON)
J
IN
–25
is calculated from the ambient temperature T
= 3.6V
D
SYNCHRONOUS SWITCH
MAIN SWITCH
PARAMETER
RUN Threshold
RUN Input Current
according to the following formula:
J
vs Temperature
= T
0
0
TEMPERATURE ( C)
PULSE SKIPPING MODE
TEMPERATURE ( C)
A
+ (P
BURST MODE
25
V
IN
D
= 3V
• 110 C/W)
50
50
V
V
IN
IN
75
= 3V
= 5V
V
IN
W
= 5V
100
100
1875 G01
1875 G04
U
125
125
A
595
575
555
535
515
495
0.6
0.5
0.4
0.3
0.2
0.1
and power
A
0
–50
= 25 C. V
0
R
CONDITIONS
V
V
Oscillator Frequency
vs Temperature
DS(ON)
RUN
RUN
V
IN
–25
= 3.6V
Ramping Up
= 0V
The
vs Input Voltage
2
IN
0
INPUT VOLTAGE (V)
TEMPERATURE ( C)
= 3.6V unless otherwise noted.
denotes specifications which apply over the full operating
25
SYNCHRONOUS SWITCH
MAIN SWITCH
4
Note 4: The LTC1875 is tested in a feedback loop which servos V
balance point for the error amplifier (V
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 6: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125 C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
50
75
6
100
1875 G05
1875 G02
125
8
580
570
560
550
540
530
10
9
8
7
6
5
4
3
2
1
0
–50
Switch Leakage Current
vs Temperature
0
Oscillator Frequency
vs Supply Voltage
V
RUN = 0V
IN
MIN
0.2
= 7V
ITH
SYNCHRONOUS SWITCH
= 1.2V)
2
SUPPLY VOLTAGE (V)
0
TEMPERATURE ( C)
TYP
0.7
0.01
MAIN SWITCH
4
LTC1875
50
MAX
1.5
1
6
FB
100
to the
1875 G06
UNITS
1875 G03
3
1875f
125
8
V
A