LTC3738 Linear Technology, LTC3738 Datasheet - Page 3

• Manufacturer Part Number: LTC3738
• Description: 3-Phase Buck Controller
• Manufacturer: Linear Technology

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ELECTRICAL CHARACTERISTICS
SYMBOL
V
UVR
I
V
I
V
V
I
I
I
DF
TG t
BG t
TG/BG t
BG/TG t
t
VID Parameters
VID
VID
VID9/VID10
ATTEN
Power Good Output Indication
V
I
V
V
t
temperature range, otherwise specifications are at T
Q
SS
SCL
SDLHO
SENSE
ON(MIN)
PGOOD
PGBLNK
PSTH
OUTEN
SSARM
SSLO
PGL
PGTHNEG
PGTHPOS
MAX
IL
IH
R,
R,
t
F
t
ERR
F
1D
2D
PARAMETER
Pulse Skip Threshold
Undervoltage SS Reset
Input DC Supply Current
OUTEN Pin ON Threshold
Soft-Start Charge Current
SS Pin Arming Threshold
SS Pin Latch-Off Threshold
SS Discharge Current
Shutdown Latch Disable Current
Total SENSE Pins Source Current
Maximum Duty Factor
Top Gate Rise Time
Top Gate Fall Time
Bottom Gate Rise Time
Bottom Gate Fall Time
Top Gate Off to Bottom Gate On Delay All Controllers, C
Synchronous Switch-On Delay Time
Bottom Gate Off to Top Gate On Delay All Controllers, C
Top Switch-On Delay Time
Minimum On-Time
Maximum Low Level Input Voltage
Minimum High Level Input Voltage
VRM9 Enable Threshold at VID5
VID0 to VID4
PGOOD Voltage Output Low
PGOOD Output Leakage
PGOOD Trip Thesholds
V
V
Power Good Blanking
DIFFOUT
DIFFOUT
Normal Mode
Shutdown
Ramping Negative
Ramping Positive
CONDITIONS
Measured at FCB pin
V
(Note 4)
V
V
V
V
V
Latch-Off is Armed
V
Soft-Short Condition V
V
SENSE1
SENSE3
In Dropout
C
C
C
C
Tested with a Square Wave (Note 5)
(Note 6)
I
V
V
VID Code = 110101
PGOOD Goes Low After V
After VID Changes Outside PGOOD Window
PGOOD
CC
CC
OUTEN
OUTEN
SS
SS
SS
EAIN
LOAD
LOAD
LOAD
LOAD
PGOOD
DIFFOUT
, Ramping Positive Until Short-Circuit
, Ramping Negative
= 5V
= 1.9V
Lowered Until the SS Pin is Pulled Low
A
= 0.3V, V
= 3300pF
= 3300pF
= 3300pF
= 3300pF
= 25°C. V
, Ramping Positive
= 2mA
= 0V
= 5V
+
+
, SENSE1
, SENSE3
with Respect to Set Output Voltage,
The
SS
LOAD
LOAD
●
CC
= 4.5V
–
–
denotes the specifications which apply over the full operating
, SENSE2
All Equal 1.2V
= V
= 3300pF Each Driver
= 3300pF Each Driver
EAIN
OUTEN
UVDLY
= 0.3V, V
+
, SENSE2
= V
Delay
SS
SS
= 5V unless otherwise noted.
= 4.5V
–
,
●
V
CC
–0.25
–0.8
MIN
3.3
0.4
0.8
3.5
–5
95
–7
– 1.5 V
7
V
CC
–1.5
–1.5
98.5
CC
TYP
120
–10
100
3.8
2.5
0.6
3.8
3.3
1.5
0.1
90
30
40
30
20
60
60
20
10
– 0.7 V
– 1
LTC3738
CC
MAX
–2.5
0.25
100
120
–14
4.5
0.8
4.5
0.4
4.5
0.3
90
90
90
90
±1
5
14
– 0.3
UNITS
3
3738f
mA
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
ns
ns
ns
µs
%
%
%
%
V
V
V
V
V
V
V
V
V