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LTC3704_15 Datasheet, PDF (2/28 Pages) Linear Technology – Wide Input Range, No RSENSE Positive-to-Negative DC/DC Controller
LTC3704
ABSOLUTE AXI U RATI GS
(Note 1)
VIN Voltage ............................................... – 0.3V to 36V
INTVCC Voltage ........................................... – 0.3V to 7V
INTVCC Output Current ........................................ 50mA
GATE Voltage ........................... – 0.3V to VINTVCC + 0.3V
ITH Voltage ............................................... – 0.3V to 2.7V
NFB Voltage .............................................. –2.7V to 2.7V
RUN, MODE/SYNC Voltages ....................... – 0.3V to 7V
FREQ Voltage ............................................– 0.3V to 1.5V
SENSE Pin Voltage ................................... – 0.3V to 36V
Operating Temperature Range (Note 2) .. – 40°C to 85°C
LTC3704E ............................................ –40°C to 85°C
LTC3704I ........................................... –40°C to 125°C
Junction Temperature (Note 3) ............................ 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
RUN 1
10 SENSE
ITH 2
NFB 3
FREQ 4
9 VIN
8 INTVCC
7 GATE
MODE/ 5
6 GND
SYNC
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 120°C/ W
ORDER PART
NUMBER
MS PART MARKING
LTC3704EMS
LTC3704IMS
LTYT
LTCFW
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 specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VIN = VINTVCC = 5V, VRUN = 1.5V, RT = 80k, VMODE/SYNC = 0V, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
Main Control Loop
VIN(MIN)
IQ
VRUN+
VRUN–
Minimum Input Voltage
Input Voltage Supply Current
Continuous Mode
Burst Mode Operation, No Load
Shutdown Mode
Rising RUN Input Threshold Voltage
Falling RUN Input Threshold Voltage
(VINTVCC = Open, No Switching) (Note 4)
VMODE/SYNC = 5V, VITH = 0.75V
VMODE/SYNC = 0V, VITH = 0V (Note 5)
VRUN = 0V
VINTVCC = Open
VINTVCC = Open
2.5
1.223
● 1.198
550
250
10
1.348
1.248
1000
500
20
1.273
1.298
VRUN(HYST)
IRUN
VNFB
RUN Pin Input Threshold Hysteresis
RUN Input Current
Negative Feedback Voltage
INFB
ΔVNFB
ΔVIN
ΔVNFB
ΔVITH
gm
VITH(BURST)
VSENSE(MAX)
ISENSE(ON)
ISENSE(OFF)
NFB Pin Input Current
Line Regulation
Load Regulation
Error Amplifier Transconductance
Burst Mode Operation ITH Pin Voltage
Maximum Current Sense Input Threshold
SENSE Pin Current (GATE High)
SENSE Pin Current (GATE Low)
VITH = 0.4V (Note 5)
VITH = 0.4V (Note 5)
VITH = 0.4V (I-Grade) (Notes 2 and 5)
2.5V ≤ VIN ≤ 30V
50
–1.218
● –1.212
● –1.205
100
1
–1.230
7.5
0.002
150
100
–1.242
–1.248
–1.255
15
0.02
VMODE/SYNC = 0V, VITH = 0.5V to 0.90V (Note 5) ● – 1
– 0.1
ITH Pin Load = ±5μA (Note 5)
Falling ITH Voltage
Duty Cycle < 20%
VSENSE = 0V
VSENSE = 30V
650
0.17
120 150 180
40
75
0.1
5
UNITS
V
μA
μA
μA
V
V
V
mV
nA
V
V
V
μA
%/V
%
μmho
V
mV
μA
μA
3704fb
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