ltc3730 Linear Technology Corporation, ltc3730 Datasheet - Page 3

• Manufacturer Part Number: ltc3730
• Description: 3-phase, 5-bit Intel Mobile Vid, 600khz, Synchronous Buck Controller
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
SYMBOL
I
I
V
V
V
I
I
I
DF
TG t
BG t
TG/BG t
BG/TG t
t
VID Parameters
VID
VID
VID
ATTEN
Power Good Output Indication
V
I
V
V
V
Oscillator and Phase-Locked Loop
f
f
f
R
R
I
R
temperature range, otherwise specifications are at T
Q
RUN/SS
SCL
SDLHO
SENSE
ON(MIN)
PGOOD
NOM
LOW
HIGH
PLL LPF
RUN/SS
RUN/SSARM
RUN/SSLO
PGL
PGTHNEG
PGTHPOS
UVDLY
PLLTH
PLL IN
RELPHS
MAX
IL
IH
PULLUP
R,
R,
t
F
t
ERR
F
1D
2D
PARAMETER
Input DC Supply Current
Soft-Start Charge Current
RUN/SS Pin ON Threshold
RUN/SS Pin Arming Threshold
RUN/SS Pin Latch-Off Threshold
RUN/SS Discharge Current
Shutdown Latch Disable Current
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
Synchronous Switch-On Delay Time
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
Minimum On-Time
Maximum Low Level Input Voltage
Minimum High Level Input Voltage
VID0 to VID4 Internal Pull-Up Current
VID0 to VID4
PGOOD Voltage Output Low
PGOOD Output Leakage
PGOOD Trip Thesholds
V
V
Power Good Fault Report Delay
Nominal Frequency
Lowest Frequency
Highest Frequency
PLLIN Input Threshold
PLLIN Input Resistance
Phase Detector Output Current
Controller 2-Controller 1 Phase
Controller 3-Controller 1 Phase
AMPOUT
AMPOUT
Normal Mode
Shutdown
Sinking Capability
Sourcing Capability
Ramping Negative
Ramping Positive
CONDITIONS
(Note 4)
V
V
V
V
V
Latch-Off is Armed
V
Soft-Short Condition V
V
SENSE1
SENSE3
In Dropout, V
C
C
C
C
All Controllers, C
All Controllers, C
Tested with a Square Wave (Note 5)
V
(Note 6)
V
VID Code = 11111,
PGOOD Goes Low After V
After V
V
V
V
f
f
I
V
PLLIN
PLLIN
CC
RUN/SS
RUN/SS
RUN/SS
RUN/SS
RUN/SS
EAIN
LOAD
LOAD
LOAD
LOAD
VID
PGOOD
AMPOUT
PLLFLTR
PLLFLTR
PLLFLTR
PGOOD
A
= 5V
= 0V
= 25°C. V
= 0.375V, V
< f
> f
= 3300pF
= 3300pF
= 3300pF
= 3300pF
EAIN
, Ramping Positive
, Ramping Positive Until Short-Circuit
, Ramping Negative
= 2mA
+
+
= 0V, VID0 to VID4 Open
= 1.9V
= 5V
OSC
OSC
, SENSE1
, SENSE3
with Respect to Set Output Voltage,
= 1.2V
= 0V
= 2.4V
The
is Forced Outside V
SENSEMAX
●
CC
LOAD
LOAD
RUN/SS
denotes the specifications which apply over the full operating
–
–
= V
, SENSE2
All Equal 1.2V; Current at Each Pin
= 3300pF Each Driver
= 3300pF Each Driver
EAIN
RUN/SS
≤ 30mV
= 4.5V
UVDLY
= 0.375V, V
+
, SENSE2
UV
= 5V unless otherwise noted.
Delay
Threshold
RUN/SS
–
,
= 4.5V
●
– 0.25
–0.8
MIN
360
190
600
–5
–7
95
1
2
7
–1.5
–1.5
98.5
TYP
110
–10
100
400
225
680
120
240
2.3
3.2
1.5
0.1
1.5
3.8
20
13
30
40
30
20
50
60
50
20
20
3
11
1
LTC3730
MAX
–2.5
0.25
–13
150
440
260
750
3.5
1.9
4.5
0.4
0.3
50
20
90
90
90
90
±1
5
13
UNITS
3730fa
3
Deg
Deg
kHz
kHz
kHz
mA
kΩ
µA
µA
µA
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
ns
ns
ns
µs
%
%
%
%
V
V
V
V
V
V
V