LTC3729L-6 Datasheet, PDF (2/28 Pages) Linear Technology – PolyPhase, Synchronous Step-Down Switching Regulator

LTC3729L-6
ABSOLUTE AXI U RATI GS (Note 1)
Input Supply Voltage (V_IN).........................30V to – 0.3V
Topside Driver Voltages (BOOST1,2) .........36V to – 0.3V
Switch Voltage (SW1, 2) .............................30V to – 5 V
SENSE1⁺, SENSE2 ⁺, SENSE1^–,
SENSE2 ^– Voltages ........................ (1.1)INTV_CC to – 0.3V
EAIN, V_OS+, V_OS–, EXTV_CC, INTV_CC,
RUN/SS, PGOOD Voltages ...........................7V to – 0.3V
Boosted Driver Voltage (BOOST-SW) ..........7V to – 0.3V
PLLFLTR, PLLIN, CLKOUT, PHASMD,
V_DIFFOUT Voltages ................................ INTV_CC to – 0.3V
I_TH Voltage ................................................ 2.7V to – 0.3V
Peak Output Current <1µs (TGL1,2, BG1,2)............... 3A
INTV_CC RMS Output Current ................................ 40mA
Operating Ambient Temperature Range
LTC3729LEUH-6 (Note 6) ..................... – 40°C to 85°C
Junction Temperature (Note 2) ............................. 125°C
Storage Temperature Range ................. – 65°C to 125°C
Reflow Peak Body Temperature ............................ 240°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
32 31 30 29 28 27 26 25
EAIN 1
24 BOOST1
PLLFLTR 2
PLLIN 3
23 V_IN
22 BG1
PHASMD 4
I_TH 5
SGND 6
21 EXTV_CC
20 INTV_CC
19 PGND
V_DIFFOUT 7
V_OS– 8
18 BG2
17 BOOST2
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
EXPOSED PAD IS SIGNAL GROUND
(MUST BE SOLDERED TO PCB)
T_JMAX = 125°C, θ_JA = 34°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
LTC3729LEUH-6
UH PART
MARKING
3729L6
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_IN = 15V, V_RUN/SS = 5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Main Control Loop
V_EAIN
Regulated Feedback Voltage
V_SENSEMAX Maximum Current Sense Threshold
(Note 3); I_TH Voltage = 1.2V
V_SENSE ^– = 5V
q 0.594 0.600 0.606
V
q 62
75
88
mV
65
75
85
mV
I_INEAIN
Feedback Current
(Note 3)
–5
– 50
nA
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