LT3472 データシートの表示（PDF） - Linear Technology
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LT3472 Datasheet PDF : 12 Pages
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LT3472
ABSOLUTE AXI U RATI GS
(Note 1)
VIN, SHDN Voltage ................................................... 16V
SWP, SWN, VPOS Voltage ....................................... 36V
DN Voltage ............................................................ –36V
FBP, FBN, SSP, SSN Voltage ................................... 10V
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range
Extended Commercial ......................... –40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SWP 1
10 VPOS
VIN 2
SHDN 3
11
9 SSP
8 FBP
SWN 4
7 SSN
DN 5
6 FBN
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W, θJC = 3°C/W
EXPOSED PAD IS GND (PIN 11)
MUST BE SOLDERED TO PCB
ORDER PART
NUMBER
LT3472EDD
DFN PART
MARKING
LBGC
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 = 3V, SHDN = 3V unless otherwise noted.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Operation Voltage
2.2
V
Maximum Operation Voltage
16
V
Supply Current
SHDN = 3V, Not Switching
SHDN = 0V
2.8
mA
0.1
1
µA
SHDN Voltage High
● 0.8
V
SHDN Voltage Low
●
0.3
V
SHDN Pin Bias Current
SHDN = 3V
35
µA
Positive Feedback Voltage
● 1.2
1.25
1.3
V
Negative Feedback Voltage
● –5
0
5
mV
Positive Feedback Voltage Line Regulation
0.01
%/V
Negative Feedback Voltage Line Regulation
0.008
mV/V
FBP Current
FBN Current
FBP to Start Negative Channel
FBP = VFBP
FBN = VFBN
● 24.5
25
25.3
µA
● 24.5
25
25.3
µA
1.02 1.1 1.18
V
Switching Frequency
0.9
1.1
1.4
MHz
Maximum Duty Cycle (Both Channels)
● 88
92
%
Positive Channel Switch Current Limit
● 250
350
mA
Negative Channel Switch Current Limit
● 300
400
mA
Positive Channel Switch VCESAT
Negative Channel Switch VCESAT
Switch Leakage Current (Both Channels)
Schottky DP Forward Drop
Schottky DN Forward Drop
Schottky Leakage Current (Both Channels)
ISWP = 200mA
ISWN = 200mA
VSW = 5V
IDP = 150mA
IDN = 150mA
VR = 36V
245
mV
400
mV
0.01
5
µA
700 950
mV
750 1000
mV
4
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3472E is guaranteed to meet specified performance from
0°C to 70°C. Specifications over the –40°C to 85°C operating range are
assured by design, characterization and correlation with statistical process
controls.
3472f
2
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