LTC3802 Datasheet, PDF (2/28 Pages) Linear Technology – Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking

LTC3802
ABSOLUTE AXI U RATI GS (Note 1)
Supply Voltage
V_CC, PV_CC ............................................................. 7V
BOOSTn .............................................................. 37V
BOOSTn – SWn .................................................... 7V
SWn ........................................................ –1V to 30V
Input Voltage
V_INFF .................................................................... 30V
FBn, CMPINn, FBT, PLLIN, FCB,
RUN/SS, PGOOD, PLLLPF, PHASEMD,
EXTREF, I_MAXn .......................... –0.3V to V_CC + 0.3V
Extended Commercial
Operating Temperature Range (Note 2) .. –40°C to 85°C
Storage Temperature Range
LTC3802EGN ................................... – 65°C to 150°C
LTC3802EUH ................................... – 65°C to 125°C
Lead Temperature (Soldering, 10 sec)
LTC3802EGN Only ........................................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
PV_CC 1
BG1 2
BOOST1 3
TG1 4
SW1 5
PGND 6
I_MAX1 7
FBT 8
CMPIN1 9
COMP1 10
FB1 11
SGND 12
FCB 13
RUN/SS 14
28 BG2
27 BOOST2
26 TG2
25 SW2
24 PLLIN
23 PLLLPF
22 I_MAX2
21 CMPIN2
20 V_CC
19 COMP2
18 FB2
17 PHASEMD
16 V_INFF
15 PGOOD
GN PACKAGE
28-LEAD PLASTIC SSOP
T_JMAX = 125°C, θ_JA = 110°C/W
ORDER PART
NUMBER
LTC3802EGN
TOP VIEW
32 31 30 29 28 27 26 25
SW1 1
24 PGND
PGND 2
23 PGND
PGND 3
I_MAX1 4
FBT 5
CMPIN1 6
COMP1 7
FB1 8
22 PLLIN
21 PLLLPF
33
20 I_MAX2
19 CMPIN2
18 V_CC
17 COMP2
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 34°C/W
EXPOSED PAD (PIN 33) IS GND
MUST BE SOLDERED TO PCB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
LTC3802EUH
UH PART
MARKING
3802
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range. (Note 3) V_CC = PV_CC = BOOST = 5V, unless otherwise specified.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_CC
PV_CC
BV_CC
V_UVLO
I_VCC
V_CC Supply Voltage
PV_CC Supply Voltage
BOOST Pin Voltage
Positive Undervoltage Lockout
V_CC Supply Current
(Note 4)
V_BOOST – V_SW (Note 4)
Measured at V_CC
Measured at V_INFF
V_FB = V_COMP
V_RUN/SS = 0V, PLLIN Floating
q3
5
6
V
q
5
6
V
q
5
6
V
2.2
2.5
2.8
V
2.2
2.5
2.8
V
q
6.5
9
mA
q
100 150
µA
3802f
2