LTC3561 データシートの表示（PDF） - Linear Technology
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LTC3561 Datasheet PDF : 16 Pages
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LTC3561
ABSOLUTE AXI U RATI GS
(Note 1)
PVIN, SVIN Voltages .....................................– 0.3V to 6V
VFB, SHDN/RT Voltages ................ – 0.3V to (VIN + 0.3V)
ITH Voltage ................................................– 0.3V to 1.4V
SW Voltage ................................... – 0.3V to (VIN + 0.3V)
Operating Ambient Temperature Range
(Note 2) .................................................. – 40°C to 85°C
Junction Temperature (Notes 5, 8) ....................... 125°C
Storage Temperature Range ................. – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SHDN/RT 1
8 ITH
SGND 2
7 VFB
9
SW 3
6 SVIN
PGND 4
5 PVIN
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W, θJC = 3°C/W
EXPOSED PAD (PIN 9) MUST BE SOLDERED TO GROUND
ORDER PART NUMBER
LTC3561EDD
DD PART MARKING
LCJJ
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3.3V, RT = 324k unless otherwise specified. (Note 2)
SYMBOL
VIN
IFB
VFB
∆VLINEREG
∆VLOADREG
gm(EA)
IS
VSHDN/RT
fOSC
ILIM
RDS(ON)
ISW(LKG)
VUVLO
PARAMETER
Operating Voltage Range
Feedback Pin Input Current
Feedback Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
Error Amplifier Transconductance
Input DC Supply Current (Note 4)
Active Mode
Shutdown
Shutdown Threshold High
Active Oscillator Resistor
Oscillator Frequency
Peak Switch Current Limit
Top Switch On-Resistance (Note 6)
Bottom Switch On-Resistance (Note 6)
Switch Leakage Current
Undervoltage Lockout Threshold
CONDITIONS
(Note 3)
(Note 3)
VIN = 2.7V to 5V
ITH = 0.36, (Note 3)
ITH = 0.84, (Note 3)
ITH Pin Load = ±5µA (Note 3)
VFB = 0.75V
VSHDN/RT = 3.3V
RT = 324k
(Note 7)
ITH = 1.3
VIN = 3.3V
VIN = 3.3V
VIN = 6V, VITH/RUN = 0V, VFB = 0V
VIN Ramping Down
MIN
2.625
● 0.784
●
●
TYP
0.8
0.04
0.02
– 0.02
800
MAX
5.5
±0.1
0.816
0.2
0.2
– 0.2
UNITS
V
µA
V
%/V
%
%
µS
240 350
µA
0.1
1
µA
VIN – 0.6 VIN – 0.4
V
324k 1M
Ω
0.85
1
1.15
MHz
4
MHz
1.4
1.7
A
0.11 0.15
Ω
0.11 0.15
Ω
0.01
1
µA
2.375 2.5 2.625
V
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. No pin shall exceed 6V.
Note 2: The LTC3561E is guaranteed to meet specified performance from
0°C to 85°C. Specifications over the – 40°C to 85°C operating ambient
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: The LTC3561 is tested in a feedback loop which servos VFB to the
midpoint for the error amplifier (VITH = 0.6V).
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
3561f
2
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