LTC1709EG-8 Linear Technology, LTC1709EG-8 Datasheet - Page 4

• Manufacturer Part Number: LTC1709EG-8
• Description: IC REG SW 2PH SYNC STPDWN 36SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1709EG-8

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 1.3 ~ 3.5 V
• Current - Output: 3A
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Frequency - Switching: -

ELECTRICAL CHARACTERISTICS
LTC1709-8/LTC1709-9
temperature range, otherwise specifications are at T
SYMBOL
PGOOD Output
V
I
V
Differential Amplifier/Op Amp Gain Block
A
CMRR
R
Note 1: Absolute Maximum Ratings are those values beyond which the
life of a device may be impaired.
Note 2: The LTC1709EG is guaranteed to meet performance specifications
from 0 C to 70 C. Specifications over the – 40 C to 85 C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: T
dissipation P
Note 4: The LTC1709-8/LTC1709-9 are tested in a feedback loop that
servos V
TYPICAL PERFOR A CE CHARACTERISTICS
4
PGOOD
PGL
PG
DA
IN
100
LTC1709EG: T
80
60
40
20
0
0.1
DA
Efficiency vs Output Current
(Figure 12)
ITH
J
is calculated from the ambient temperature T
to a specified voltage and measures the resultant V
D
PARAMETER
PGOOD Voltage Low
PGOOD Leakage Current
PGOOD Trip Level, Either Controller
Gain
Common Mode Rejection Ratio
Input Resistance
according to the following formula:
OUTPUT CURRENT (A)
J
= T
1
A
+ (P
V
V
V
V
IN
IN
IN
IN
D
= 5V
= 8V
= 12V
= 20V
• 85 C/W)
10
V
V
FREQ = 200kHz
OUT
EXTVCC
W
= 2V
= 0V
170989 G01
U
100
A
CONDITIONS
I
V
V
0V < V
Measured at V
100
PGOOD
and power
PGOOD
EAIN
80
60
40
20
0
0.1
V
V
A
Efficiency vs Output Current
(Figure 12)
EAIN
EAIN
with Respect to Set Output Voltage
= 25 C. V
CM
EAIN
= 2mA
= 5V
V
EXTVCC
Ramping Negative
Ramping Positive
< 5V
.
The
OS
OUTPUT CURRENT (A)
= 5V
+ Input
IN
1
V
denotes the specifications which apply over the full operating
= 15V, V
EXTVCC
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 6: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 7: The minimum on-time condition corresponds to the on inductor
peak-to-peak ripple current 40% I
Considerations in the Applications Information section).
Note 8: Each built-in pull-up resistor attached to the VID inputs also has a
series diode to allow input voltages higher than the VIDV
damage or clamping (see the Applications Information section).
= 0V
RUN/SS
10
V
V
FREQ = 200kHz
IN
OUT
= 12V
= 2V
= 5V unless otherwise noted.
170989 G02
100
100
90
80
70
5
Efficiency vs Output Current
(Figure 12)
V
V
I
MAX
OUT
0.995
OUT
EXTVCC
MIN
– 6
46
6
= 20A
(see Minimum On-Time
= 3.3V
= 5V
10
– 7.5
TYP
0.1
55
80
7.5
1
V
IN
(V)
CC
1.005
MAX
– 9.5
0.3
supply without
15
9.5
1
170989 G03
UNITS
V/V
k
dB
20
%
%
V
A