LTC3729EG#TR Linear Technology, LTC3729EG#TR Datasheet - Page 9

• 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

PIN FUNCTIONS
EXTV
Internal Switch . This switch closes and supplies INTV
bypassing the internal low dropout regulator whenever
EXTV
the Applications Information section. Do not exceed 7V
on this pin and ensure V
FUNCTIONAL DIAGRAM
R
C
F
LP
LP
IN
V
CC
CC
IN
+
5V
is higher than 4.7V. See EXTV
PHASMD
DIFFOUT
CLKOUT
(Pin 22/Pin 21): External Power Input to an
PLLLPF
PGOOD
EXTV
INTV
PLLIN
SGND
V
V
V
OS
OS
IN
CC
–
+
CC
50k
±2µA
40k
40k
PHASE LOGIC
OSCILLATOR
4.7V
PHASE DET
–
40k
+
40k
0.80V
–
+
EXTVCC
A1
G Package/UH Package
CLK1
CLK2
INTERNAL
–
–
+
+
SUPPLY
V
LDO
REG
5V
REF
≤ V
0.86V
EAIN
0.74V
INTVCC
CC
DUPLICATE FOR SECOND
CONTROLLER CHANNEL
.
Connection in
1.2µA
6V
4(V
0.86V
FB
SLOPE
COMP
)
I1
S
R
CC
–
,
+
Q
Q
–
DROP
OUT
DET
45k
V
decoupled to the IC’s signal ground pin.
CLKOUT (Pin 28/Pin 27): Output Clock Signal available
to daisychain other controller ICs for additional MOSFET
driver stages/phases.
+
IN
4(V
SHDN
RST
FB
(Pin 24/Pin 23): Main Supply Pin. Should be closely
)
BOT
FORCE BOT
SHDN
FCB
START
45k
SOFT
RUN
OV
2.4V
EA
SWITCH
–
+
+
–
LOGIC
0.80V
0.86V
TOP
BOT
INTV
CC
INTV
30k
30k
CC
SENSE
SENSE
BOOST
RUN/SS
PGND
EAIN
SW
TG
BG
I
TH
+
–
C
C
INTV
R
R2
SENSE
R1
CC
C
R
D
SS
L
C
C
B
B
LTC3729
V
IN
+
3729fb
9
C
IN