ltc1709eg-trpbf Linear Technology Corporation, ltc1709eg-trpbf Datasheet - Page 3

• Manufacturer Part Number: ltc1709eg-trpbf
• Description: 2-phase, 5-bit Adjustable,high Efficiency, Synchronous Step-down Switching Regulator
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
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
VID Parameters
R
ATTEN
R
VID
VID
VID
Oscillator and Phase-Locked Loop
f
f
f
R
I
R
Differential Amplifier/Op Amp Gain Block (Note 9)
A
CMRR
SCL
SDLHO
SENSE
ON(MIN)
NOM
LOW
HIGH
PLLFLTR
RUN/SSLO
INTVCC
LDO
LDO
EXTVCC
LDOHYS
DA
ATTEN
PULLUP
PLLIN
RELPHS
MAX
THLOW
THHIGH
LEAK
INT
EXT
DA
ERR
1D
2D
r
f
r
f
CC
Regulator
PARAMETER
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
Resistance Between ATTENIN and
ATTENOUT Pins
Resistive Divider Worst-Case Error
VID0–VID4 Pull-Up Resistance
VID0–VID4 Logic Threshold Low
VID0–VID4 Logic Threshold High
VID0–VID4 Leakage
Nominal Frequency
Lowest Frequency
Highest Frequency
PLLIN Input Resistance
Phase Detector Output Current
Controller 2-Controller 1 Phase
Gain
Common Mode Rejection Ratio
Sinking Capability
Sourcing Capability
CC
CC
CC
CC
Load Regulation
Voltage Drop
Switchover Voltage
Switchover Hysteresis
CC
Voltage
CONDITIONS
V
Soft Short Condition V
V
V
Each Channel: V
In Dropout
(Note 6)
C
C
(Note 6)
C
C
(Note 6)
C
(Note 6)
C
Tested with a Square Wave (Note 7)
6V < V
I
I
I
I
Programmed from 1.3V to 2.05V (VID4 = 0)
Programmed from 2.1V to 3.5V (VID4 = 1)
(Note 8)
V
V
V
V
f
f
Differential Amp Mode
Differential Amp Mode; 0V < V
CC
CC
CC
CC
PLLIN
PLLIN
RUN/SS
RUN/SS
EAIN
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
BIAS
PLLFLTR
PLLFLTR
PLLFLTR
= 0 to 20mA; V
= 20mA; V
= 20mA, EXTV
= 20mA, EXTV
A
= 0.5V
< VID0–VID4 < 7V
< f
> f
= 25 C. V
= 3300pF
= 3300pF
= 3300pF
= 3300pF
= 3300pF Each Driver
= 3300pF Each Driver
IN
= 4.5V
Rising from 3V
OSC
OSC
< 30V; V
= 1.2V
= 0V
2.4V
The
EXTVCC
SENSE1
IN
EXTVCC
CC
CC
EXTVCC
denotes the specifications which apply over the full operating
= 15V, V
Ramping Positive
Ramping Negative
= 5V
EAIN
–
, 2
= 4V
= 4V
– = V
= 0.5V;
RUN/SS
CM
SENSE1
< 5V
= 5V unless otherwise noted.
+
, 2
+ = 0V
– 0.25
– 0.35
0.995
MIN
– 85
190
120
280
0.5
4.8
4.5
1.6
98
46
99.5
TYP
– 60
– 15
180
120
220
140
310
180
4.1
1.6
5.0
0.2
4.7
0.2
30
40
30
20
90
90
20
40
50
55
2
1
15
LTC1709
+ 0.25
+ 0.25
1.005
MAX
200
240
250
160
360
4.5
5.2
1.0
0.4
90
90
90
90
4
5
1
UNITS
3
Deg
kHz
kHz
kHz
V/V
mV
k
k
k
dB
ns
ns
ns
ns
ns
ns
ns
%
%
%
%
V
A
A
A
V
V
V
V
V
A
A
A