LTC1871EMS-7 Linear Technology, LTC1871EMS-7 Datasheet - Page 4

• 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: -

ELECTRICAL CHARACTERISTICS
LTC1871-7
temperature range, otherwise specifi cations are at T
SYMBOL
UVLO
ΔV
ΔV
V
V
GATE Driver
t
t
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC1871E-7 is guaranteed to meet performance specifi cations
from 0°C to 70°C junction temperature. Specifi cations over the – 40°C
to 85°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTC1871I-7 is guaranteed over the full –40°C to 125°C operating junction
temperature range.
Note 3: T
dissipation P
TYPICAL PERFORMANCE CHARACTERISTICS
4
r
f
ΔV
LDO(LOAD)
DROPOUT
ΔV
INTVCC
INTVCC
T
1.25
1.24
1.23
1.22
1.21
IN1
IN2
J
= T
–50
FB Voltage vs Temp
J
A
is calculated from the ambient temperature T
+ (P
–25
D
according to the following formula:
PARAMETER
INTVCC Undervoltage Lockout Threshold
INTV
INTV
INTV
INTV
GATE Driver Output Rise Time
GATE Driver Output Fall Time
D
• 120°C/W)
0
TEMPERATURE (°C)
CC
CC
CC
CC
25
Regulator Line Regulation
Regulator Line Regulation
Load Regulation
Regulator Dropout Voltage
50
75
100
125
18717 G01
150
1.229
A
1.231
1.230
A
and power
= 25°C. V
FB Voltage Line Regulation
0
CONDITIONS
Rising INTV
Falling INTV
UVLO Hysteresis
8V ≤ V
15V ≤ V
0 ≤ I
V
C
C
IN
L
L
= 3300pF (Note 7)
= 3300pF (Note 7)
= 6V, INTV
INTVCC
5
The
IN
IN
IN
≤ 15V
= 8V, V
10
≤ 30V
l
≤ 20mA, V
CC
CC
denotes the specifi cations which apply over the full operating
CC
15
V
Load = 20mA
RUN
IN
Note 4: The dynamic input supply current is higher due to power MOSFET
gate charging (Q
Note 5: The LTC1871-7 is tested in a feedback loop that servos V
reference voltage with the I
(the no load to full load operating voltage range for the I
1.23V).
Note 6: In a synchronized application, the internal slope compensation
gain is increased by 25%. Synchronizing to a signifi cantly higher ratio will
reduce the effective amount of slope compensation, which could result in
subharmonic oscillation for duty cycles greater than 50%.
Note 7: Rise and fall times are measured at 10% and 90% levels.
(V)
20
= 1.5V, R
IN
= 8V
25
FREQ
30
18717 G02
G
= 80k, V
• f
35
OSC
). See Applications Information.
TH
MODE/SYNC
pin forced to a voltage between 0V and 1.4V
60
50
10
40
30
20
0
–50
FB Pin Current vs Temperature
–25
MIN
– 2
= 0V, unless otherwise specifi ed.
0
TEMPERATURE (°C)
25
–0.2
TYP
280
5.6
4.6
1.0
70
17
8
8
50
TH
75
MAX
200
100
100
pin is 0.3V to
25
100
FB
125 150
to the
18717 G03
UNITS
18717fc
mV
mV
mV
ns
ns
%
V
V
V