LTC3718EG Linear Technology, LTC3718EG Datasheet - Page 2

• Manufacturer Part Number: LTC3718EG
• Description: IC DC/DC CONTRLR DDR/QDR 24-SSOP
• Manufacturer: Linear Technology

Specifications of LTC3718EG

• Applications: Controller, DDR, QDR
• Voltage - Input: 1.5 ~ 36 V
• Number Of Outputs: 1
• Voltage - Output: 0.75 ~ 18 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ABSOLUTE AXI U RATI GS
ELECTRICAL CHARACTERISTICS
LTC3718
(Note 1)
Input Supply Voltage (V
Boosted Topside Driver Supply Voltage
V
RUN/SS, PGOOD Voltages ......................... 7V to – 0.3V
V
I
SW2 Voltage ............................................. 36V to – 0.4V
V
SHDN Voltage ......................................................... 10V
TG, BG, INTV
TG, BG, INTV
Operating Ambient Temperature
Junction Temperature (Note 2) ............................ 125 C
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
temperature range, otherwise specifications are T
SYMBOL
Buck Regulator
I
V
g
t
t
t
V
V
V
V
2
Q(VIN1)
ON
ON(MIN)
OFF(MIN)
TH
m(EA)
FB1
V
V
SENSE(MAX)
SENSE(MIN)
V
V
RUN/SS(ON)
RUN/SS(LE)
IN1
ON
FB2
FB1(LINE)
FB1(LOAD)
FB1(OV)
FB1(UV)
(BOOST) ............................................... 42V to – 0.3V
Range (Note 4) ................................... – 40 C to 85 C
, V
, V
, I
Voltage ................................................. V
FB1
ON
REF
, SW1 Voltage ............................. 36V to – 0.3V
Voltages .................................... 2.7V to – 0.3V
, V
RNG
CC
CC
PARAMETER
Input DC Supply Current (V
Feedback Voltage Accuracy
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Error Amplifier Transconductance
On-Time
Minimum On-Time
Minimum Off-Time
Maximum Current Sense Threshold
V
Minimum Current Sense Threshold
V
Output Overvoltage Fault Threshold
Output Undervoltage Fault Threshold
RUN Pin Start Threshold
RUN Pin Latchoff Enable
PGND
PGND
Normal
Shutdown Supply Current
Peak Currents .................................. 2A
RMS Currents ............................ 50mA
Voltages .......(INTV
W
– V
– V
SW1
SW1
IN2
(Source)
(Sink)
) .......................10V to – 0.3V
W W
IN1
)
CC
+ 0.3V) to – 0.3V
A
U
= 25 C. V
IN2
CONDITIONS
V
I
V
I
I
I
I
I
V
V
V
V
V
V
RUN/SS Pin Rising
TH
TH
TH
ON
ON
ON
RUN/SS
IN1
RNG
RNG
RNG
RNG
RNG
RNG
+ 0.3V
The
= 1.2V (Note 3)
= 0.5V to 1.9V (Note 3)
= 1.2V (Note 3)
= 60 A, V
= 30 A, V
= 180 A
= 4V to 36V, I
= 1V, V
= 0V, V
= INTV
= 1V, V
= 0V, V
= INTV
IN1
= 0V
= 15V, V
denotes specifications which apply over the full operating
CC
CC
FB1
FB1
FB1
FB1
ON
ON
, V
, V
PACKAGE/ORDER I FOR ATIO
Consult LTC Marketing for parts specified with wider operating temperature ranges.
= 1.5V
= 1.5V
= V
= V
= V
= V
FB1
FB1
TH
IN2
REF
REF
REF
REF
= V
= V
= 1.2V (Note 3)
RUN/SS
PGOOD
SGND1
SGND2
/2 – 50mV
/2 – 50mV
/2 + 50mV
/2 + 50mV
= 1.5V unless otherwise noted.
SHDN
REF
REF
V
V
V
V
V
RNG
I
FB1
REF
FB2
I
ON
ON
TH
/2 – 50mV
/2 + 50mV
T
JMAX
24-LEAD PLASTIC SSOP
10
11
12
1
2
3
4
5
6
7
8
9
= 125 C,
G PACKAGE
TOP VIEW
JA
= 130 C/ W
24
23
22
21
20
19
18
17
16
15
14
13
BOOST
TG
SW1
SENSE
SENSE
PGND1
BG
INTV
V
V
PGND2
SW2
– 0.65
– 200
–140
MIN
0.93
–97
IN1
IN2
200
400
108
148
0.8
76
8
CC
U
+
–
– 0.05
0.002
– 235
1000
–165
–115
1.13
TYP
– 25
250
500
300
135
185
0.1
1.5
15
50
95
10
4
ORDER PART
W
LTC3718EG
NUMBER
–190
–133
– 270
MAX
2000
– 0.3
0.65
1.33
300
600
100
400
162
114
222
4.5
30
12
2
UNITS
U
3718fa
%/V
mV
mV
mV
mV
mV
mV
mS
ns
ns
ns
ns
%
%
%
%
A
A
V
V