LTC3729EG#TR Linear Technology, LTC3729EG#TR Datasheet - Page 3

• 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

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
Main Control Loop
V
V
I
V
V
V
UVLO
g
g
I
I
V
V
I
I
I
DF
TG1, 2 t
TG1, 2 t
BG1, 2 t
BG1, 2 t
TG/BG t
BG/TG t
t
Internal V
V
V
V
V
V
Oscillator and Phase-Locked Loop
f
f
f
R
INEAIN
Q
RUN/SS
SCL
SDLDO
SENSE
ON(MIN)
NOM
LOW
HIGH
m
mOL
EAIN
SENSEMAX
LOADREG
REFLNREG
OVL
RUN/SS
RUN/SSLO
INTVCC
LDO
LDO
EXTVCC
LDOHYS
PLLIN
MAX
INT
EXT
1D
2D
r
f
r
f
CC
Regulator
PARAMETER
Regulated Feedback Voltage
Maximum Current Sense Threshold
Feedback Current
Output Voltage Load Regulation
Reference Voltage Line Regulation
Output Overvoltage Threshold
Transconductance Amplifier g
Transconductance Amplifier Gain
Input DC Supply Current
Soft‑Start Charge Current
RUN/SS Pin ON Threshold
RUN/SS Pin Latchoff Arming
RUN/SS Discharge Current
Shutdown Latch Disable Current
Total Sense Pins Source Current
Maximum Duty Factor
Top Gate Transition Time:
Rise Time
Fall Time
Bottom Gate Transition Time:
Rise Time
Fall Time
Top Gate Off to Bottom Gate On Delay
Synchronous Switch‑On Delay Time
Bottom Gate Off to Top Gate On Delay
Top Switch‑On Delay Time
Minimum On‑Time
Internal V
INTV
EXTV
EXTV
EXTV
Nominal Frequency
Lowest Frequency
Highest Frequency
PLLIN Input Resistance
Undervoltage Lockout
Normal Mode
Shutdown
CC
CC
CC
CC
Load Regulation
Voltage Drop
Switchover Voltage
Switchover Hysteresis
CC
Voltage
m
CONDITIONS
(Note 3); I
V
V
(Note 3)
(Note 3)
Measured in Servo Loop; I
Measured in Servo Loop; I
V
Measured at V
V
I
I
(Note 4)
EXTV
V
V
V
V
Soft Short Condition V
V
Each Channel; V
In Dropout
C
C
C
C
C
C
Tested with a Square Wave (Note 5)
6V < V
I
I
I
I
V
V
V
TH
TH
CC
CC
CC
CC
SENSE
SENSE1, 2
IN
IN
RUN/SS
RUN/SS
RUN/SS
RUN/SS
EAIN
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
PLLFLTR
PLLFLTR
PLLFLTR
= 1.2V; Sink/Source 5µA; (Note 3)
= 1.2V; (g
= 0 to 20mA; V
= 20mA; V
= 20mA, EXTV
= 20mA, EXTV
= 3.6V to 30V (Note 3)
Ramping Down
A
CC
= 0.5V
= 25°C. V
= 3300pF
= 3300pF
= 3300pF
= 3300pF
= 3300pF Each Driver
= 3300pF Each Driver
IN
–
Tied to V
= 5V
= 0V
= 1.9V
Rising
Rising from 3V
< 30V; V
= 1.2V
= 0V
≥ 2.4V
TH
= 5V
The
Voltage = 1.2V
m
EXTVCC
EAIN
xZ
SENSE1
l
OUT
IN
L
EXTVCC
CC
CC
; No Ext Load); (Note 3)
EXTVCC
denotes the specifications which apply over the full operating
= 15V, V
; V
Ramping Positive
Ramping Negative
= 5V
EAIN
–
OUT
, 2
= 4V
–
= 4V
TH
TH
= 0.5V; V
= V
= 5V
RUN/SS
Voltage = 0.7V
Voltage = 2V
SENSE1
RUN/SS
= 5V unless otherwise noted.
+
, 2
+
= 0V
= 4.5V
l
l
l
l
l
l
0.792
MIN
0.84
–0.5
–85
360
230
480
1.0
0.5
4.8
4.5
62
65
98
3
0.800
0.002
–0.1
0.86
–1.2
99.5
TYP
580
–60
100
400
260
550
0.1
3.5
1.5
1.5
3.8
1.6
5.0
0.2
4.7
0.2
75
75
–5
20
30
40
30
20
90
90
80
50
3
2
LTC3729
0.808
MAX
–0.5
0.02
0.88
–50
160
440
290
590
0.5
1.9
4.5
5.2
1.0
88
85
40
90
90
90
90
4
4
5
UNITS
mmho
V/mV
3729fb
3
%/V
kHz
kHz
kHz
mV
mV
mV
kΩ
nA
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
ns
ns
ns
%
%
%
%
V
V
V
V
V
V
V
V