LTC3527 Linear Technology Corporation, LTC3527 Datasheet - Page 3

• Manufacturer Part Number: LTC3527
• Description: 1.2MHz/2.2MHz Synchronous Step-Up DC/DC Converters
• Manufacturer: Linear Technology Corporation

www.DataSheet4U.com
ELECTRICAL CHARACTERISTICS
temperature range, –40
PARAMETER
NMOS Switch On-Resistance, SW1
NMOS Switch On-Resistance, SW2
PMOS Switch On-Resistance, SW1
PMOS Switch On-Resistance, SW2
NMOS Current Limit, SW1
NMOS Current Limit, SW2
Current Limit Delay to Output Time
Maximum Duty Cycle
Minimum Duty Cycle
Switching Frequency
Switching Frequency
⎯ S ⎯ H ⎯ D ⎯ N ⎯ 1 , ⎯ 2 Input High Voltage
⎯ S ⎯ H ⎯ D ⎯ N ⎯ 1 , ⎯ 2 Input Low Voltage
⎯ S ⎯ H ⎯ D ⎯ N ⎯ 1 , ⎯ 2 Input Current
PGOOD1, PGOOD2 Threshold
PGOOD1, PGOOD2 Low Voltage
PGOOD1, PGOOD2 Leakage Current
MODE Input High Voltage
MODE Input Low Voltage
MODE Input Current
FSEL Input High Voltage
FSEL Input Low Voltage
FSEL Input Current
Soft-Start Time
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 LTC3527E/LTC3527E-1 are guaranteed to meet performance
specifi cations from 0°C to 85°C. Specifi cations over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 3: Current is measured into the V
bootstrapped to the output. The current will refl ect to the input supply by:
(V
OUT
/V
IN
) • (1/Effi ciency). All switches are off.
°
C to 85
°
C. V
OUT
IN
pin since the supply current is
= 1.2V, V
OUT1
CONDITIONS
(Note 4)
V
V
V
V
V
Referenced to the Feedback Voltage
I
V
V
V
PGOOD1,2
FB1,2
FB1,2
FSEL
FSEL
⎯ S ⎯ H ⎯ D ⎯ N ⎯ 1 , ⎯ 2
PGOOD1,2
MODE
FSEL
= V
= 0V
= 3.3V
= 3.3V
= 1V
= 1.3V
= 3.3V
OUT2
= 3.3V
= 1mA
The
= 5.25V
= 3.3V, T
●
denotes the specifi cations which apply over the full operating
Note 4: Specifi cation is guaranteed by design and not 100% tested in
production.
Note 5: The LTC3527/LTC3527-1 includes an overtemperature shutdown
that is intended to protect the device during momentary overload
conditions. Junction temperature will exceed 125°C when the over-
temperature shutdown is active. Continuous operation above the specifi ed
maximum junction temperature may impair device reliability.
A
= 25°C, unless otherwise noted.
LTC3527/LTC3527-1
●
●
●
●
●
●
MIN
0.88
0.88
800
400
0.9
1.9
85
–6
1
0.30
0.50
0.40
0.60
0.01
TYP
1.2
2.2
0.1
0.5
60
90
–9
1
1
1
MAX
0.35
0.35
0.35
–14
1.5
2.8
0.2
0
2
1
2
2
UNITS
35271f
3
MHz
MHz
mA
mA
ms
µA
µA
µA
µA
ns
Ω
Ω
Ω
Ω
%
%
%
V
V
V
V
V
V
V