LTC3717-1 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
LTC3717-1
Linear Technology
'LTC3717-1' PDF : 20 Pages View PDF
LTC3717-1
ABSOLUTE AXI U RATI GS
(Note 1)
Boosted Topside Driver Supply Voltage
(BOOST) ............................................... 42V to – 0.3V
VIN, ION, SW, SENSE+ Voltage .................. 36V to – 0.3V
EXTVCC, DRVCC, RUN/SS, PGOOD,
(BOOST – SW) Voltages ............................ 7V to – 0.3V
VON, VREF, VRNG Voltages .......(INTVCC + 0.3V) to – 0.3V
ITH, VFB Voltages...................................... 2.7V to – 0.3V
TG, BG, INTVCC, EXTVCC, DRVCC Peak Currents ....... 2A
TG, BG, INTVCC, EXTVCC, DRVCC RMS Currents .. 50mA
Operating Ambient Temperature
Range (Note 4) ................................... – 40°C to 85°C
Junction Temperature (Note 2) ............................ 125°C
Storage Temperature Range ................. – 65°C to 125°C
Reflow Peak Body Temperature ............................ 260°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
32 31 30 29 28 27 26 25
VON 1
PGOOD 2
24 SW
23 SENSE+
VRNG 3
ITH 4
SGND 5
22 NC
21 SENSE–
33
20 PGND
ION 6
VFB 7
NC 8
19 BG
18 DRVCC
17 INTVCC
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 34°C/ W
EXPOSED PAD IS SGND (PIN 33) MUST BE SOLDERED TO PCB
ORDER PART NUMBER QFN PART MARKING
LTC3717EUH-1
37171
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 TA = 25°C. VIN = 15V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
Buck Regulator
IQ(VIN)
VFB
∆VFB(LINE)
∆VFB(LOAD)
gm(EA)
tON
tON(MIN)
tOFF(MIN)
VSENSE(MAX)
VSENSE(MIN)
Input DC Supply Current (VIN)
Normal
Shutdown Supply Current
Feedback Voltage Accuracy
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Error Amplifier Transconductance
On-Time
Minimum On-Time
Minimum Off-Time
Maximum Current Sense Threshold
VPGND – VSW (Source)
Minimum Current Sense Threshold
VPGND – VSW (Sink)
VRUN/SS = 0V
ITH = 1.2V (Note 3), VREF = 2.4V
VIN = 4V to 36V, ITH = 1.2V (Note 3)
ITH = 0.5V to 1.9V (Note 3)
ITH = 1.2V (Note 3)
ION = 30µA, VON = 0V
ION = 60µA, VON = 0V
ION = 180µA
VRNG = 1V, VFB = VREF/2 – 50mV
VRNG = 0V, VFB = VREF/2 – 50mV
VRNG = INTVCC, VFB = VREF/2 – 50mV
VRNG = 1V, VFB = VREF/2 + 50mV
VRNG = 0V, VFB = VREF/2 + 50mV
VRNG = INTVCC, VFB = VREF/2 + 50mV
q – 0.65
q
0.93
186
95
q 108
q 76
q 148
q –140
q –97
q – 200
1000
15
0.1
0.002
– 0.05
1.13
233
115
50
300
135
95
185
– 165
– 115
– 235
2000
30
0.65
– 0.3
1.33
280
135
100
400
162
114
222
– 190
– 133
– 270
UNITS
µA
µA
%
%/V
%
mS
ns
ns
ns
ns
mV
mV
mV
mV
mV
mV
sn37171 37171fs
2
Share Link: 