LTC3729EG#TR Linear Technology, LTC3729EG#TR Datasheet - Page 30

• Manufacturer Part Number: LTC3729EG#TR
• Description: IC SW REG SYNC STEP-DOWN 28-SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3729EG#TR

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 5 V
• Current - Output: 5A
• Frequency - Switching: 1.1MHz
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: LTC3729EGTR

LTC3729
TYPICAL APPLICATION
RELATED PARTS
PART NUMBER
LTC3856
LTC3880/LTC3880‑1 Dual Output PolyPhase Step‑Down DC/DC Controller with
LTC3829
LTC3869/LTC3869‑2 Dual Output, 2‑Phase Synchronous Step‑Down DC/DC
LTC3850/LTC3850‑1
LTC3850‑2
LTC3855
LTC3853
LTC3860
LTC3857/LTC3857‑1 Low I
30
V
V
SWITCHING FREQUENCY = 250kHz
IN
OUT
13.2k
: 5V TO 16V
: 3.3V/30A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035‑7417
(408) 432‑1900
3.3k
0.1µF
100pF
16.5k
33pF
DESCRIPTION
Single Output 2‑Channel Polyphase Synchronous Step‑Down
DC/DC Controller with Diff Amp and up to 12‑Phase Operation
Digital Power System Management
Single Output 3‑Channel Polyphase Synchronous Step‑Down
DC/DC Controller with Diff Amp and up to 6‑Phase Operation
Controller, with Accurate Current Share
Dual Output, 2‑Phase Synchronous Step‑Down DC/DC
Controller, R
Dual Output, 2‑phase, Synchronous Step‑Down DC/DC
Controller with Diff Amp and DCR Temperature Compensation
Triple Output, Multiphase Synchronous Step‑Down DC/DC
Controller, R
Dual, Multiphase, Synchronous Step‑Down DC/DC Controller
with Diff Amp and Three‑State Output Drive
Controller with 99% Duty Cycle
●
1000pF
Q
, Dual Output 2‑Phase Synchronous Step‑Down DC/DC
FAX: (408) 434‑0507
1000pF
1000pF
SENSE
SENSE
MI, M3: IRF7811
M2, M4: IRF7809
L1, L2: 1µH SUMIDA CEP125-1R0MC-H
Figure 12. 3.3V/30A Power Supply with Active Voltage Positioning
or DCR Current Sensing
or DCR Current Sensing and Tracking
10
11
12
13
14
1
2
3
4
5
6
7
8
9
RUN/SS
SENSE1
SENSE1
EAIN
PLLFLTR
PLLIN
PHASMD
I
SGND
V
V
V
SENSE2
SENSE2
TH
DIFFOUT
OS
OS
–
+
●
+
–
–
+
www.linear.com
LTC3729
CLKOUT
BOOST1
BOOST2
EXTV
PGOOD
INTV
PGND
SW1
SW2
BG1
BG2
TG1
TG2
V
CC
CC
IN
28
27
26
25
24
23
22
21
20
19
18
17
16
15
5V
C
C
D3, D4: CENTRAL CMDSH-3TR
IN
OUT
D4
1µF,6.3V
0.47µF
: OS CON 2-16SP270M
0.47µF
: KEMET 3-T510 470mF
100k
D3
COMMENTS
PLL Fixed 250kHz to 770kHz Frequency, 4.5V ≤ V
0.8V≤ V
I
0.5V ≤ V
PLL Fixed 250kHz to 770kHz Frequency, 4.5V ≤ V
0.8V ≤ V
PLL Fixed 250kHz to 750kHz Frequency, 4V ≤ V
V
PLL Fixed 250kHz to 780kHz Frequency, 4V ≤ V
0.8V ≤ V
PLL Fixed Frequency 250kHz to 770kHz, 4.5V ≤ V
0.8V ≤ V
PLL Fixed 250kHz to 750kHz Frequency, 4V ≤ V
V
Operates with Power Blocks, DRMOS Devices or External
MOSFETs 3V ≤ V
Phase‑Lockable Fixed Operating Frequency 50kHz to 900kHz,
4V ≤ V
2
OUT3
OUT3
POWER
GOOD
C/PMBus Interface with EEPROM and 16‑Bit ADC, V
4.7µF
6.3V
Up to 12.5V
Up to 13.5V
IN
OUT
0.1µF
OUT
OUT
OUT
OUT
10
≤ 38V, 0.8V ≤ V
≤ 5V
≤ 5.5V, Analog Control Loop
≤ 5V
≤ 5.25V
≤ 12V
M1
M3
IN
≤ 24V, t
L1
L2
OUT
C
IN
ON(MIN)
≤ 24V, I
 LINEAR TECHNOLOGY CORPORATION 2001
M2
M4
= 20ns
Q
0.003
0.003
= 50µA
D1
UPS840
D2
UPS840
0311 REV B • PRINTED IN USA
C
OUT
IN
IN
IN
IN
IN
IN
≤ 38V,
≤ 30V,
≤ 24V,
≤ 38V,
≤ 38V,
≤ 38V,
IN
V
6V TO
16V
V
3.3V/30A
Up to 24V,
IN
OUT
3729TA02
3729fb