LTC1709EG-7 Linear Technology, LTC1709EG-7 Datasheet - Page 4

• Manufacturer Part Number: LTC1709EG-7
• Description: IC SW REG STEP-DOWN SYNC 36-SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1709EG-7

• 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
LTC1709-7
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-7 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 LTC1709-7 is tested in a feedback loop that servos V
specified voltage and measures the resultant V
TYPICAL PERFOR A CE CHARACTERISTICS
4
PGOOD
PGL
PG
DA
IN
100
LTC1709EG-7: T
90
80
70
60
50
40
30
20
10
0
0.01
DA
Efficiency vs Load Current
(3 Operating Modes) (Figure 12)
OPERATION
Burst Mode
J
is calculated from the ambient temperature T
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:
0.1
LOAD CURRENT (A)
J
CONSTANT
FREQUENCY
(BURST DISABLE)
= T
FORCED
CONTINUOUS
MODE
A
1
+ (P
D
• 85 C/W)
V
V
FREQ = 200kHz
IN
OUT
10
= 5V
W
= 1.6V
17097 G01
U
100
EAIN
.
A
100
CONDITIONS
I
V
V
0V < V
Measured at V
PGOOD
80
60
40
20
and power
PGOOD
EAIN
0
0.1
V
V
Efficiency vs Output Current
(Figure 12)
A
EAIN
EAIN
with Respect to Set Output Voltage
= 25 C. V
CM
= 2mA
= 5V
ITH
Ramping Negative
Ramping Positive
< 5V
The
to a
OUTPUT CURRENT (A)
OS
+ Input
1
IN
denotes the specifications which apply over the full operating
= 15V, V
V
V
V
V
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).
IN
IN
IN
IN
= 5V
= 8V
= 12V
= 20V
10
BIAS
V
V
FREQ = 200kHz
V
OUT
EXTVCC
FCB
= 0V
= 2V
= 5V, V
= 0V
17097 G02
100
RUN/SS
= 5V unless otherwise noted.
100
90
70
80
60
50
5
Efficiency vs Input Voltage
(Figure 12)
I
MAX
OUT
V
0.995
V
OUT
MIN
OUT
– 6
46
6
= 20A
(see Minimum On-Time
= 1.6V
= 2V
INPUT VOLTAGE (V)
10
– 7.5
TYP
0.1
55
80
7.5
1
CC
1.005
MAX
– 9.5
0.3
15
supply without
9.5
1
17097 G03
UNITS
V/V
k
dB
20
%
%
V
A