ltc3729euh-trpbf Linear Technology Corporation, ltc3729euh-trpbf Datasheet - Page 3

• Manufacturer Part Number: ltc3729euh-trpbf
• Description: 550khz, Polyphase, High Efficiency, Synchronous Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
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
I
R
Q
RUN/SS
SCL
SDLDO
SENSE
ON(MIN)
NOM
LOW
HIGH
PLLFLTR
m
mOL
REFLNREG
OVL
RUN/SS
RUN/SSLO
INTVCC
LDO
LDO
EXTVCC
LDOHYS
PLLIN
RELPHS
MAX
INT
EXT
1D
2D
r
f
r
f
CC
Regulator
PARAMETER
Reference Voltage Line Regulation
Output Overvoltage Threshold
Undervoltage Lockout
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
Phase Detector Output Current
Controller 2-Controller 1 Phase
Normal Mode
Shutdown
Sinking Capability
Sourcing Capability
CC
CC
CC
CC
Load Regulation
Voltage Drop
Switchover Voltage
Switchover Hysteresis
CC
Voltage
m
CONDITIONS
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
f
f
V
V
TH
TH
CC
CC
CC
CC
PLLIN
PLLIN
IN
IN
RUN/SS
RUN/SS
RUN/SS
RUN/SS
EAIN
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
PLLFLTR
PLLFLTR
PLLFLTR
PHASMD
PHASMD
= 1.2V; Sink/Source 5 A; (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
< f
> f
= 3300pF
= 3300pF
= 3300pF
= 3300pF
= 3300pF Each Driver
= 3300pF Each Driver
IN
= 25 C. V
Tied to V
= 0V
= 1.9V
Rising
Rising from 3V
OSC
OSC
< 30V; V
= 1.2V
= 0V
= 0V, Open
= 5V
2.4V
The
m
EXTVCC
EAIN
xZ
SENSE1
OUT
L
EXTVCC
IN
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
– = V
= 0.5V; V
= 5V
RUN/SS
SENSE1
RUN/SS
+
= 5V unless otherwise noted.
, 2
+ = 0V
= 4.5V
– 0.5
0.84
MIN
– 85
360
230
480
1.0
0.5
4.8
4.5
98
3
0.002
0.86
– 1.2
99.5
TYP
– 60
– 15
580
100
400
260
550
180
240
3.5
1.5
1.5
3.8
1.6
5.0
0.2
4.7
0.2
30
40
30
20
90
90
20
80
50
3
2
15
LTC3729
MAX
0.02
0.88
160
440
290
590
1.9
4.5
5.2
1.0
40
90
90
90
90
4
4
5
sn3729 3729fas
UNITS
mmho
V/mV
3
%/V
Deg
Deg
kHz
kHz
kHz
mV
k
ns
ns
ns
ns
ns
ns
ns
%
%
V
V
A
A
A
V
V
A
A
A
V
V
V
A
A