LTC3441 データシートの表示（PDF） - Linear Technology
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LTC3441 Datasheet PDF : 20 Pages
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LT3420/LT3420-1
ABSOLUTE AXI U RATI GS
(Note 1)
VCC Voltage .............................................................. 16V
VBAT Voltage ............................................................ 16V
SW Voltage (Note 2)
LT3420 ................................................................ 38V
LT3420-1 ............................................................ 50V
SEC Current ...................................................... ±200mA
RFB Current ........................................................... ±3mA
RREF Voltage ........................................................... 2.5V
CHARGE Voltage ...................................................... 16V
CT Voltage .............................................................. 1.5V
DONE Voltage .......................................................... 16V
Current into DONE Pin .......................................... ±1mA
Maximum Junction Temperature .......................... 125°C
Operating Ambient Temperature Range
(Note 3) .............................................. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
RREF 1
VBAT 2
RFB 3
VCC 4
GND 5
TOP VIEW
10 CT
9 CHARGE
8 DONE
7 SEC
6 SW
MS10 PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 100°C/W, θJC = 45°C/W
(4-LAYER BOARD)
ORDER PART
NUMBER
LT3420EMS
LT3420EMS-1
MS PART MARKING
LTYH
LTAJG
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = VBAT = 3.3V, VCHARGE = VCC unless otherwise noted. (Note 3)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Operating Voltage, VCC
Maximum Operating Voltage, VCC
VCC UVLO Hysteresis
Minimum VBAT Voltage
Maximum VBAT Voltage
VBAT UVLO Hysteresis
RREF Threshold Voltage
q
2.2
2.5
V
16
V
40
mV
1.6
1.8
V
16
V
275
mV
0.98 1.00 1.02
V
q 0.975
1.025
V
RREF Pin Bias Current
Quiescent Current
Quiescent Current in Shutdown
Primary Side Current Limit
VRREF = 0V, Switching
VRFB = VBAT – 0.2V (Note 4)
VRREF = 1.1V, Not Switching
VCHARGE = 0V, VIN = 3.3V
LT3420 (Note 5)
LT3420-1 (Note 5)
2
4
µA
90
130
µA
0.01
1
µA
1.20
1.4
1.60
A
0.75
0.9
1.05
A
Secondary Side Current Limit
LT3420 (Note 5)
LT3420-1 (Note 5)
20
40
50
mA
5
15
25
mA
Leakage Blanking Pulse Width
LT3420
LT3420-1
200
ns
0
ns
Refresh Timer Charge/Discharge Current
Refresh Timer Upper Threshold
VCT = 0.75V
1.5
2.5
3.5
µA
0.9
1.0
1.1
V
Refresh Timer Lower Threshold
0.45
0.5
0.55
V
3420fa
2
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