EXPOSED PAD (PIN 11) IS PGND, MUST BE SOLDERED TO PCB
MSE PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 40°C/W
EXPOSED PAD (PIN 13) IS PGND MUST BE SOLDERED TO PCB
FOR RATED THERMAL PERFORMANCE AND LOAD REGULATION
orDer inForMaTion
LEAD FREE FINISH
LTC3536EDD#PBF
LTC3536IDD#PBF
LTC3536EMSE#PBF
LTC3536IMSE#PBF
TAPE AND REEL
LTC3536EDD#TRPBF
LTC3536IDD#TRPBF
LTC3536EMSE#TRPBF
LTC3536IMSE#TRPBF
PART MARKING*
LFZD
LFZD
3536
3536
PACKAGE DESCRIPTION
10-Lead (3mm
×
3mm) Plastic DFN
10-Lead (3mm
×
3mm) Plastic DFN
12-Lead Plastic MSOP
12-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
The
l
denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 3.3V, V
OUT
= 3.3V, R
T
= 100kΩ unless otherwise noted.
PARAMETER
Input Operating Range
Output Voltage Adjust Range
Undervoltage Lockout Threshold
Feedback Voltage
Feedback Pin Input Current (FB)
Quiescent Current, Burst Mode Operation
Quiescent Current, Shutdown (I
VIN
)
V
IN
Ramping Down
V
IN
Ramping Up
0°C < T
J
< 85°C (Note 5)
–40°C < T
J
< 125°C
V
FB
= 0.6V in Servo Loop, V
MODE/SYNC
= 0V
V
FB
= 0.7V, V
MODE/SYNC
= V
IN
V
SHDN
= 0V
32
0.1
CONDITIONS
l
l
l
l
l
elecTrical characTerisTics
MIN
1.8
1.8
1.6
0.594
0.591
TYP
MAX
5.5
5.5
UNITS
V
V
V
V
V
V
nA
µA
µA
3536fa
1.67
1.75
0.6
0.6
1.8
0.606
0.609
50
42
1
2
LTC3536
elecTrical characTerisTics
PARAMETER
Quiescent Current, Active (I
VIN
)
Input Current Limit
Peak Current Limit
Burst Mode Peak Current Limit
Reverse Current Limit
NMOS Switch Leakage
PMOS Switch Leakage
NMOS Switch On-Resistance
PMOS Switch On-Resistance
Frequency Accuracy
Frequency Accuracy Default
Internal Soft-Start Time
Maximum Duty Cycle
Minimum Duty Cycle
Error Amplifier AVOL
Error Amplifier Sink Current
Error Amplifier Source Current
MODE/SYNC Input Logic Threshold
MODE/SYNC External Synchronization
MODE/SYNC Synchronization Frequency
MODE/SYNC Input Current
SHDN
Input Logic Threshold
SHDN
Input Current
V
SHDN
= 5.5V = V
IN
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 LTC3536 is tested under pulsed load conditions such that
T
J
≈
T
A
. The LTC3536E is guaranteed to meet specifications
from 0°C to 125°C junction temperature. Specifications over the
–40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LTC3536I is guaranteed over the full –40°C to 125°C operating
junction temperature range. Note that the maximum ambient temperature
consistent with these specifications is determined by specific operating
conditions in conjunction with board layout, the rated package thermal
impedance and other environmental factors. The junction temperature
(T
J
, in °C) is calculated from the ambient temperature (T
A
, in °C) and
power dissipation (P
D
, in watts) according to the formula:
T
J
= T
A
+ (P
D
•
θ
JA
),
where
θ
JA
(in °C/W) is the package thermal impedance.
V
MODE/SYNC
= 5.5V = V
IN
l
The
l
denotes the specifications which apply over the full operating junction
temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 3.3V, V
OUT
= 3.3V, R
T
= 100kΩ unless otherwise noted.
CONDITIONS
V
FB
= 0.7V, V
MODE/SYNC
= 0V
V
MODE/SYNC
= 0V (Note 4)
V
MODE/SYNC
= 0V (Note 4)
V
MODE/SYNC
= V
IN
(Note 4)
(Note 4)
Switch B, C: SW1 = SW2 = 5.5V, V
IN
= 5.5V, V
OUT
= 5.5V
Switch A, D: SW1 = SW2 = 0V, V
IN
= 5.5V, V
OUT
= 5.5V
Switch B (From SW1 to GND) (Note 6)
Switch C (From SW2 to GND) (Note 6)
Switch A (From V
IN
to SW1) (Note 6)
Switch D (From V
OUT
to SW2) (Note 6)
R
T
= 100k
R
T
= V
IN
V
FB
from 0.06V to 0.54V
Percentage of Period SW2 is Low in Boost Mode
Percentage of Period SW1 is High in Buck Mode
FB = 1.3V, VC = 1V
FB = 0.3V, VC = 0V
Disable Burst Mode Operation
SYNC Level High
SYNC Level Low
l
l
l
l
l
l
l
l
l
MIN
2
0.4
0.3
TYP
2.5
3.4
0.6
0.55
0.1
0.1
0.11
0.1
0.12
0.145
MAX
800
4
UNITS
µA
A
A
A
A
1
1
µA
µA
Ω
Ω
Ω
Ω
0.8
0.96
0.6
88
1
1.2
0.9
91
1.2
1.44
1.2
0
MHz
MHz
ms
%
%
dB
µA
µA
90
250
400
0.3
1.2
0.3
0.3
300
480
1
0.4
2
1
1
1
V
V
V
MHz
µA
V
µA
Note 3:
This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. The maximum
rated junction temperature will be exceeded when this protection is active.
Continuous operation above the specified absolute maximum operating
junction temperature may impair device reliability or permanently damage
the device.
Note 4:
Current measurements are performed when the LTC3536 is
not switching. The current limit values measured in operation will be
somewhat higher due to the propagation delay of the comparators.
Note 5:
Guaranteed by design characterization and correlation with
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