LTC3728LXCUH Linear Technology, LTC3728LXCUH Datasheet - Page 32

• Manufacturer Part Number: LTC3728LXCUH
• Description: IC CTRLR SW REG 2-PH SYNC 32-QFN
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3728LXCUH

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 7 V
• Current - Output: 3A
• Frequency - Switching: 250kHz ~ 550kHz
• Voltage - Input: 4.5 ~ 28 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

TYPICAL APPLICATIONS
LTC3728L/LTC3728LX
32
V
V
SWITCHING FREQUENCY = 250kHz
MI, M2: FDS6982S OR VISHAY Si4810DY
L1: SUMIDA CEP123-6R3MC
T1: 10μH 1:1.8 — DALE LPE6562-A262 GAPPED E-CORE OR BH ELECTRONICS #501-0657 GAPPED TOROID
IN
OUT
180pF
180pF
0.1μF
: 7V TO 28V
33pF
33pF
20k
15k
15k
20k
1%
1%
: 5V, 3A/3.3V, 6A/12V, 150mA
59k
0.1μF
1000pF
1000pF
105k, 1%
63.4k
1%
Figure 12. LTC3728L/LTC3728LX High Effi ciency Low Noise 5V/3A, 3.3V/5A, 12V/120mA Regulator
1000pF
1000pF
3.3V
RUN/SS1
SENSE1
SENSE1
V
PLLFLTR
PLLIN
FCB
I
SGND
3.3V
I
V
SENSE2
SENSE2
TH1
TH2
LTC3728L/LTC3728LX
OSENSE1
OSENSE2
OUT
+
–
–
+
RUN/SS2
BOOST1
BOOST2
PGOOD
EXTV
INTV
PGND
SW1
SW2
TG1
BG1
BG2
TG2
V
CC
CC
IN
100k
1μF
10V
CMDSH-3TR
V
(<7V)
0.1μF
PGOOD
PULL-UP
CMDSH-3TR
0.1μF
4.7μF
1M
0.1μF
10Ω
M1
M2
Q1
Q3
MBRS1100T3
T1, 1:1.8
6.3μH
10μH
22μF
Q2
50V
L1
Q4
PANASONIC SP
PANASONIC SP
150μF, 6.3V
180μF, 4V
0.01Ω
0.015Ω
D2
D1
3728 F12
33μF
25V
3
+
V
7V TO
28V
V
3.3V
5A; 6A PEAK
IN
OUT2
LT1121
2
100k
220k
8
+
1
5
GND
1μF
25V
V
5V
3A; 4A PEAK
ON/OFF
V
12V
120mA
OUT1
OUT3
3728lxfe