LTC3704 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)
V_IN Voltage ............................................... – 0.3V to 36V
INTV_CC Voltage ........................................... – 0.3V to 7V
INTV_CC Output Current ........................................ 50mA
GATE Voltage ........................... – 0.3V to V_INTVCC + 0.3V
I_TH 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
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
I_TH 2
NFB 3
FREQ 4
9 V_IN
8 INTV_CC
7 GATE
MODE/ 5
6 GND
SYNC
MS PACKAGE
10-LEAD PLASTIC MSOP
T_JMAX = 125°C, θ_JA = 120°C/ W
ORDER PART
NUMBER
LTC3704EMS
MS PART MARKING
LTYT
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at T_A = 25°C.
V_IN = V_INTVCC = 5V, V_RUN = 1.5V, R_T = 80k, V_MODE/SYNC = 0V, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
Main Control Loop
V_IN(MIN)
I_Q
V_RUN+
V_RUN–
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
(Note 4)
V_MODE/SYNC = 5V, V_ITH = 0.75V
V_MODE/SYNC = 0V, V_ITH = 0.2V (Note 5)
V_RUN = 0V
2.5
1.223
q 1.198
550
250
10
1.348
1.248
1000
500
20
1.273
1.298
V_RUN(HYST)
I_RUN
V_NFB
RUN Pin Input Threshold Hysteresis
RUN Input Current
Negative Feedback Voltage
V_ITH = 0.2V (Note 5)
50
–1.218
q –1.212
100
1
–1.230
150
100
–1.242
–1.248
I_NFB
NFB Pin Input Current
V_ITH = 0.2V (Note 5)
7.5
15
∆V_NFB
∆V_IN
Line Regulation
2.5V ≤ V_IN ≤ 30V
0.002 0.02
∆V_NFB
∆V_ITH
Load Regulation
V_MODE/SYNC = 0V, V_TH = 0.5V to 0.90V (Note 5) q – 1
– 0.1
g_m
Error Amplifier Transconductance
I_TH Pin Load = ±5µA (Note 5)
650
V_ITH(BURST) Burst Mode Operation I_TH Pin Voltage
Falling I_TH Voltage (Note 5)
0.3
V_SENSE(MAX) Maximum Current Sense Input Threshold Duty Cycle < 20%
120 150 180
I_SENSE(ON) SENSE Pin Current (GATE High)
V_SENSE = 0V
40
75
I_SENSE(OFF) SENSE Pin Current (GATE Low)
V_SENSE = 30V
0.1
5
UNITS
V
µA
µA
µA
V
V
V
mV
nA
V
V
µA
%/V
%
µmho
V
mV
µA
µA
2
sn3704 3704fs