LTC1778EGN Linear Technology, LTC1778EGN Datasheet - Page 2

• Manufacturer Part Number: LTC1778EGN
• Description: IC CONTROLLR STP-DWN SYNC 16SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1778EGN

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Current - Output: 2A
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Voltage - Output: -
• Power - Output: -
• Frequency - Switching: -

ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
ELECTRICAL CHARACTERISTICS
LTC1778/LTC1778-1
Input Supply Voltage (V
Boosted Topside Driver Supply Voltage
(BOOST) ................................................... 42V to – 0.3V
SW Voltage .................................................. 36V to – 5V
EXTV
FCB, V
I
Consult LTC Marketing for parts specified with wider operating temperature ranges.
temperature range, otherwise specifications are T
SYMBOL
Main Control Loop
I
V
∆V
∆V
I
g
V
I
t
t
2
PGOOD Voltages ....................................... 7V to – 0.3V
TH
Q
FB
FCB
ON
ON(MIN)
m(EA)
FB
FCB
FB(LINEREG)
FB(LOADREG)
, V
RUN/SS
PGOOD
CC
FB
SGND
V
ON
RNG
FCB
V
I
I
, (BOOST – SW), RUN/SS,
ON
TH
FB
Voltages...................................... 2.7V to – 0.3V
T
, V
JMAX
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
RNG
= 125°C, θ
PARAMETER
Input DC Supply Current
Feedback Reference Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
Feedback Input Current
Error Amplifier Transconductance
Forced Continuous Threshold
Forced Continuous Pin Current
On-Time
Minimum On-Time
GN PACKAGE
Normal
Shutdown Supply Current
TOP VIEW
Voltages .......... INTV
W
JA
= 130°C/ W
16
15
14
13
12
11
10
9
IN
, I
BOOST
TG
SW
PGND
BG
INTV
V
EXTV
W W
IN
ON
CC
CC
)................. 36V to – 0.3V
U
GN PART MARKING
CC
ORDER PART
+ 0.3V to – 0.3V
W
LTC1778EGN
LTC1778IGN
NUMBER
A
U
1778
1778I
= 25°C. V
CONDITIONS
I
I
V
I
V
I
V
I
I
I
TH
TH
TH
TH
ON
ON
ON
IN
FB
FCB
= 1.2V (Note 3) LTC1778E
= 1.2V (Note 3) LTC1778I
= 0.5V to 1.9V (Note 3)
= 1.2V (Note 3)
= 4V to 30V, I
= 30µA, V
= 15µA, V
= 180µA
= 0.8V
The
= 0.8V
U
(Note 1)
IN
●
= 15V unless otherwise noted.
denotes specifications which apply over the full operating
ON
ON
= 0V (LTC1778-1)
= 0V (LTC1778-1)
TG, BG, INTV
TG, BG, INTV
Operating Ambient Temperature Range (Note 4)
Junction Temperature (Note 2) ............................ 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
TH
= 1.2V (Note 3)
LTC1778E ........................................... – 40°C to 85°C
LTC1778I .......................................... – 40°C to 125°C
RUN/SS
SGND
V
V
RNG
FCB
V
I
I
ON
ON
TH
FB
T
JMAX
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
= 125°C, θ
GN PACKAGE
TOP VIEW
CC
CC
, EXTV
, EXTV
JA
= 130°C/ W
16
15
14
13
12
11
10
9
CC
CC
●
●
●
●
●
BOOST
TG
SW
PGND
BG
INTV
V
EXTV
Peak Currents .................... 2A
RMS Currents .............. 50mA
IN
CC
0.792
0.792
CC
0.76
MIN
198
396
1.4
GN PART MARKING
– 0.05
0.800
0.800
0.002
TYP
900
233
466
1.7
0.8
15
–5
– 1
50
LTC1778EGN-1
ORDER PART
NUMBER
17781
0.808
0.812
MAX
2000
– 0.3
0.84
±50
268
536
100
30
– 2
2
UNITS
1778fb
%/V
mS
µA
µA
nA
µA
ns
ns
ns
%
V
V
V