EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB GND
MSE PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 40°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB GND
orDer inForMaTion
LEAD FREE FINISH
LTC3245EDE#PBF
LTC3245IDE#PBF
LTC3245EMSE#PBF
LTC3245IMSE#PBF
LTC3245HMSE#PBF
LTC3245MPMSE#PBF
TAPE AND REEL
LTC3245EDE#TRPBF
LTC3245IDE#TRPBF
LTC3245EMSE#TRPBF
LTC3245IMSE#TRPBF
LTC3245HMSE#TRPBF
LTC3245MPMSE#TRPBF
PART MARKING*
3245
3245
3245
3245
3245
3245
PACKAGE DESCRIPTION
12-Lead (3mm
×
4mm) Plastic DFN
12-Lead (3mm
×
4mm) Plastic DFN
12-Lead Plastic MSOP
12-Lead Plastic MSOP
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
–40°C to 150°C
–55°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/
elecTrical characTerisTics
SYMBOL
V
IN
V
UVLO
PARAMETER
Operating Input Voltage Range
V
IN
Undervoltage Lockout Threshold
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C, (Note 2). V
IN
= 12V, V
OUT
= 5V, C
FLY
= 1µF unless otherwise
noted.
CONDITIONS
l
MIN
2.7
l
TYP
2.4
2.2
MAX
38
2.7
UNITS
V
V
V
3245fa
V
IN
Rising
V
IN
Falling
2
For more information
www.linear.com/LTC3245
LTC3245
elecTrical characTerisTics
SYMBOL
I
VIN
PARAMETER
V
IN
Quiescent Current
SEL1 = SEL2 = 0V
V
OUT
Enabled,
BURST
= 0V
V
OUT
Enabled,
BURST
= V
IN
Fixed 5V Burst Mode Output Regulation
(OUTS/ADJ Connected to V
OUT
,
BURST
= 0V, SEL2 = V
IN
, SEL1 = 0V)
(Note 5)
Fixed 5V Low Noise Output Regulation
(OUTS/ADJ Connected to V
OUT
,
BURST
= V
IN
, SEL2 = V
IN
, SEL1 = 0V)
(Note 5)
Fixed 3.3V Burst Mode Output Regulation
(OUTS/ADJ Connected to V
OUT
,
BURST
= 0V, SEL2 = V
IN
, SEL1 = V
IN
)
(Note 5)
Fixed 3.3V Low Noise Output Regulation
(OUTS/ADJ Connected to V
OUT
,
BURST
= V
IN
, SEL2 = V
IN
, SEL1 = V
IN
)
(Note 5)
OUTS/ADJ Reference Voltage (Note 4)
Load Regulation (Referred to ADJ)
PGOOD Rising Threshold
PGOOD Falling Threshold
PGOOD Output Low Voltage
PGOOD Output High Leakage
BURST,
SEL1, SEL2 Input Voltage
BURST,
SEL1, SEL2 input Voltage
BURST,
SEL1, SEL2 Input Current
BURST,
SEL1, SEL2 Input Current
I
VOUT
Short-Circuit Current
Charge Pump Output Impedance
Oscillator Frequency
V
PIN
= 0V
V
PIN
= 38V
V
OUT
= GND
2:1 Step-Down Mode
1:1 Step-Down Mode
1:2 Step-Up Mode (V
IN
= 3.3V)
l
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C, (Note 2). V
IN
= 12V, V
OUT
= 5V, C
FLY
= 1µF unless otherwise noted.
CONDITIONS
Shutdown, V
OUT
= 0V
CP Enabled, Output in Regulation
CP Enabled, Output in Regulation
5V ≤ V
IN
< 38V, I
OUT
≤ 250mA
4V ≤ V
IN
< 5V, I
OUT
≤ 150mA
3.3V ≤ V
IN
< 4V, I
OUT
≤ 75mA
3V ≤ V
IN
< 3.3V, I
OUT
≤ 45mA
5V ≤ V
IN
< 38V, I
OUT
≤ 200mA
4V ≤ V
IN
< 5V, I
OUT
≤ 120mA
3.3V ≤ V
IN
< 4V, I
OUT
≤ 60mA
3V ≤ V
IN
< 3.3V, I
OUT
≤ 35mA
5V ≤ V
IN
< 38V, I
OUT
≤ 250mA
4V ≤ V
IN
< 5V, I
OUT
≤ 175mA
3.3V ≤ V
IN
< 4V, I
OUT
≤ 110mA
2.7V ≤ V
IN
< 3.3V, I
OUT
≤ 60mA
5V ≤ V
IN
< 38V, I
OUT
≤ 220mA
4V ≤ V
IN
< 5V, I
OUT
≤ 140mA
3.3V ≤ V
IN
< 4V, I
OUT
≤ 90mA
2.7V ≤ V
IN
< 3.3V, I
OUT
≤ 50mA
SEL2 = 0V, SEL1 = V
IN
, I
OUT
= 0mA
SEL2 = 0V, SEL1 = V
IN
V
OUT
% of Final Regulation Voltage
V
OUT
% of Final Regulation Voltage
I
PGOOD
= 0.2mA
V
PGOOD
= 5V
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
MIN
TYP
4
18
20
MAX
8
35
40
5.2
5.2
5.2
5.2
5.2
5.2
5.2
5.2
3.43
3.43
3.43
3.43
3.43
3.43
3.43
3.43
UNITS
µA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
mV/mA
%
%
V
µA
V
V
µA
µA
mA
Ω
Ω
Ω
V
OUT5_BM
4.8
4.8
4.8
4.8
4.8
4.8
4.8
4.8
3.17
3.17
3.17
3.17
3.17
3.17
3.17
3.17
1.176
1.200
0.2
95
88
–1
0.4
–1
0.5
91
0.1
0
0.9
1.2
0
1
900
3
3.5
14
450
V
OUT5_LN
V
OUT33_BM
V
OUT33_LN
V
ADJ
R
CL
V
PG_RISE
V
PG_FALL
V
PG_LOW
I
PG_HIGH
V
LOW
V
HIGH
I
LOW
I
HIGH
I
SHORT_CKT
R
OUT
f
OSC
1.224
98
0.4
1
2
1
3
500
kHz
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. This IC has overtemperature protection that is
intended to protect the device during momentary overload conditions.
Junction temperatures will exceed 150°C when overtemperature is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 2:
The LTC3245E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 125°C operating junction
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTC3245I is guaranteed over the
–40°C to 125°C operating junction temperature range. The LTC3245H is
guaranteed over the –40°C to 150°C operating junction temperature range
and the LTC3245MP is tested and guaranteed over the full –55°C to 150°C
operating junction temperature range. High junction temperatures degrade
operating lifetimes; operating lifetime is derated for junction temperatures
greater than 150°C. 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 resistance and
other environmental factors.
Note 3:
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.
Note 4:
V
OUT
programming range is from 2.5V to 5V. See the
Programming the Output Voltage section for more detail.
Note 5:
The maximum operating junction temperature of 150°C must be
followed. Certain combinations of input voltage and output current will
cause the junction temperature to exceed 150°C and must be avoided. See
Thermal Management section for information on calculating maximum
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