LTC1871EMS-7 Linear Technology, LTC1871EMS-7 Datasheet - Page 6

• Manufacturer Part Number: LTC1871EMS-7
• Description: IC MULTI CONFIG SYNC ADJ 10MSOP
• Manufacturer: Linear Technology
• Type: Step-Up (Boost), Flyback, Sepicr

Specifications of LTC1871EMS-7

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.23 ~ 36 V
• Current - Output: 50mA
• Frequency - Switching: 50kHz ~ 1MHz
• Voltage - Input: 6 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

LTC1871-7
TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
RUN (Pin 1): The RUN pin provides the user with an
accurate means for sensing the input voltage and pro-
gramming the start-up threshold for the converter. The
falling RUN pin threshold is nominally 1.248V and the
comparator has 100mV of hysteresis for noise immunity.
When the RUN pin is below this input threshold, the IC
is shut down and the V
value (typ 10μA). The Absolute Maximum Rating for the
voltage on this pin is 7V.
6
305
275
325
320
315
310
300
295
290
285
280
7.0
6.9
6.8
–50
0
Frequency vs Temperature
INTV
V
IN
–25
= 8V
10
CC
Load Regulation
20
0
TEMPERATURE (°C)
INTV
30
25
CC
LOAD (mA)
40
50
IN
50
75
supply current is kept to a low
100 125 150
60
70
18717 G16
18717 G13
80
145
160
155
150
140
7.2
7.1
6.9
7.0
–50
0
Maximum Sense Threshold
vs Temperature
INTV
–25
5
CC
Line Regulation
10
0
TEMPERATURE (°C)
15
25
V
IN
20
50
I
current comparator input threshold increases with this
control voltage. Nominal voltage range for this pin is 0V
to 1.40V.
FB (Pin 3): Receives the feedback voltage from the external
resistor divider across the output. Nominal voltage for
this pin in regulaton is 1.230V.
FREQ (Pin 4): A resistor from the FREQ pin to ground
programs the operating frequency of the chip. The nominal
voltage at the FREQ pin is 0.6V.
(V)
TH
25
75
(Pin 2): Error Amplifi er Compensation Pin. The
100 125 150
30
35
18717 G17
18717 G14
40
500
450
400
350
300
250
200
150
100
35
30
25
50
0
–50
0
SENSE Pin Current vs Temperature
INTV
vs Current, Temperature
GATE HIGH
V
SENSE
–25
CC
= 0V
Dropout Voltage
0
5
TEMPERATURE (°C)
INTV
25
CC
25°C
LOAD (mA)
50
10
75°C
125°C
75
100 125 150
15
150°C
–50°C
0°C
18717 G15
18717 G18
18717fc
20