LTC3735 LINER [Linear Technology], LTC3735 Datasheet - Page 3

• Manufacturer Part Number: LTC3735
• Description: 2-Phase, High Efficiency DC/DC Controller for Intel Mobile CPUs
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
Main Control Loop
Reference
V
V
V
V
I
V
g
g
V
I
UVR
I
VRUN/SS
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
VID Parameters
R
ATTEN
VID
VID
VID
PSIB
Q
RUN/SS
SCL
SDLHO
SENSE
ON(MIN)
m
mOL
SENSEMAX
LOADREG
REFLNREG
PSIB
OVL
ACTIVE
RUN/SSARM
RUN/SSLO
ATTEN
MAX
THLOW
THHIGH
LEAK
ERR
1D
2D
r
f
r
f
PARAMETER
Regulated Feedback Voltage
Maximum Current Sense Threshold
Output Voltage Load Regulation
Reference Voltage Line Regulation
Forced Continuous Threshold
Forced Continuous Current
Output Overvoltage Threshold
Transconductance Amplifier g
Transconductance Amplifier Gain
Output Voltage in Active Mode
Input DC Supply Current
Undervoltage RUN/SS Reset
Soft-Start Charge Current
RUN/SS Pin ON Threshold
RUN/SS Pin Latchoff Arming
RUN/SS Pin Latchoff Threshold
RUN/SS Discharge Current
Shutdown Latch Disable Current
Total Sense Pins Source Current
Maximum Duty Factor
Top Gate Transition Time:
Bottom Gate Transition 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
VID Top Resistance
Resistive Divider Error
VID0 to VID5 Logic Threshold Low
VID0 to VID5 Logic Threshold High
VID0 to VID5 Leakage
Normal Mode
Shutdown
Rise Time
Fall Time
Rise Time
Fall Time
m
CONDITIONS
I
I
(Note 4)
Measured in Servo Loop, ∆I
Measured in Servo Loop, ∆I
V
V
Measured with Respect to V
I
I
VID = 010110, I
VID = 010110, I
(Note 5)
V
PV
V
V
V
V
Soft-Short Condition V
V
Each Channel: V
In Dropout, V
(Note 6)
C
C
(Note 6)
C
C
C
C
Tested with a Square Wave (Note 7)
(Note 8)
TH
TH
TH
TH
PVCC
PSIB
RUN/SS
RUN/SS
RUN/SS
RUN/SS
RUN/SS
FB
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
CC
Voltage = 0.5V; Measured at V
Voltage = Max; V
= 1.2V, Sink/Source 25µA (Note 4)
= 1.2V, (g
= 0.375V, V
Lowered Until the RUN/SS Pin is Pulled Low
= 0V
A
= 4.5V to 7V
= 3300pF
= 3300pF
= 3300pF
= 3300pF
= 3300pF Each Driver (Note 6)
= 3300pF Each Driver (Note 6)
, Ramping Negative
= 25°C. V
= 0V
= 1.9V
Rising
Rising from 3V
m
SENSEMAX
The
• Z
RUN/SS
TH
TH
SENSE1
L
l
= 0.5V (0°C to 85°C)
= 0.5V (Note 2)
; No Ext Load) (Note 4)
PVCC
CM
denotes the specifications which apply over the full operating
= 4.5V
FB
–
≤ 45mV
, 2
= 1.7V
= 5V, V
= 0.375V, V
–
= V
TH
TH
FB
SENSE1
Voltage: 1.2V to 0.7V
Voltage: 1.2V to 2V
= 0.6V
RUN/SS
FB
(Note 4)
RUN/SS
+
, 2
+
= 5V unless otherwise noted.
= 0V
= 4.5V
l
l
l
l
l
l
1.342
1.336
–0.25
MIN
0.57
0.64
–2.3
–85
4.5
3.2
1.0
0.7
59
–5
95
0.600
1.356
1.356
–0.1
0.02
–0.5
0.66
–1.5
–1.5
98.5
5.33
TYP
–60
100
0.6
3.7
1.5
3.9
3.2
1.5
72
20
30
40
60
50
50
60
0.1
6
3
2
LTC3735
1.370
1.376
MAX
–0.5
0.63
0.68
–0.8
0.25
100
0.1
7.5
4.2
1.9
0.3
85
–1
90
90
90
90
±1
0.5
3
5
UNITS
mmho
3735fa
V/mV
3
%/V
mV
mA
kΩ
µA
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
ns
ns
ns
%
%
%
%
V
V
V
V
V
V
V
V
V
V
V