LTC1871-1 LINER [Linear Technology], LTC1871-1 Datasheet - Page 5

• Manufacturer Part Number: LTC1871-1
• Description: High Effi ciency, Synchronous, 4-Switch Buck-Boost Controller
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
SYMBOL
PGOOD Output
∆V
∆V
∆V
V
I
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: T
power dissipation P
Note 3: The IC is tested in a feedback loop that servos V
voltage and measures the resultant V
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
junction temperature range, otherwise specifi cations are at T
PGOOD
PGL
FBH
FBL
FB(HYST)
T
J
= T
J
A
for the QFN package is calculated from the temperature T
+ (P
D
• 34°C/W)
D
PARAMETER
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Hysteresis
PGOOD Low Voltage
PGOOD Leakage Current
according to the following formula:
OSENSE
.
ITH
to a specifi ed
CONDITIONS
V
V
V
I
V
PGOOD
OSENSE
OSENSE
OSENSE
PGOOD
A
The
and
= 2mA
A
= 5V
Rising
Falling
Returning
= 25°C. V
l
denotes the specifi cations which apply over the full operating
Note 6: The minimum on-time condition is specifi ed for an inductor
peak-to-peak ripple current ≥ 40% of I
considerations in the Applications Information section).
Note 7: The LTC3780E is guaranteed to meet performance specifi cations
from 0°C to 85°C. Performance over the –40°C to 85°C operating junction
temperature range is assured by design, characterization and correlation
with statistical process controls. The LTC3780I is guaranteed over the
–40°C to 125°C operating junction temperature range. The LTC3780MP
is guaranteed and tested over the full –55 to 125°C operating junction
temperature range.
Note 8: This parameter is guaranteed by design.
Note 9: f
IN
= 15V unless otherwise noted.
OSC
is the running frequency for the application.
–5.5
MIN
5.5
MAX
(see minimum on-time
–7.5
TYP
7.5
2.5
0.1
LTC3780
MAX
–10
0.3
10
±1
UNITS
3780fe
5
μA
%
%
%
V