LTC1778EGN Linear Technology, LTC1778EGN Datasheet - Page 4

• 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: -

LTC1778/LTC1778-1
50mV/DIV
TYPICAL PERFOR A CE CHARACTERISTICS
4
5A/DIV
100
300
250
200
150
100
V
90
80
70
60
50
50
0.001
OUT
0
I
L
Efficiency vs Load Current
0
Frequency vs Load Current
CONTINUOUS MODE
DISCONTINUOUS
Transient Response
LOAD STEP 0A TO 10A
V
V
FCB = 0V
FIGURE 9 CIRCUIT
IN
OUT
= 15V
= 2.5V
2
0.01
DISCONTINUOUS
MODE
MODE
LOAD CURRENT (A)
LOAD CURRENT (A)
4
20µs/DIV
0.1
6
V
V
EXTV
FIGURE 9 CIRCUIT
IN
OUT
CONTINUOUS
MODE
= 10V
CC
= 2.5V
1
W
= 5V
8
1778 G03
1778 G26
U
1778 G01
10
10
50mV/DIV
5A/DIV
–0.2
–0.3
–0.4
–0.1
100
V
85
95
90
80
OUT
0
I
0
L
Load Regulation
0
Efficiency vs Input Voltage
FCB = 5V
FIGURE 9 CIRCUIT
Transient Response
(Discontinuous Mode)
LOAD STEP 1A TO 10A
V
V
FCB = INTV
FIGURE 9 CIRCUIT
I
IN
OUT
LOAD
= 15V
= 2.5V
5
2
= 10A
CC
I
LOAD CURRENT (A)
INPUT VOLTAGE (V)
LOAD
10
4
= 1A
20µs/DIV
15
FIGURE 9 CIRCUIT
6
20
8
25
1778 G06
1778 G04
1778 G02
10
30
RUN/SS
2V/DIV
1V/DIV
5A/DIV
V
300
280
260
240
220
200
2.5
2.0
1.0
OUT
1.5
0.5
I
0
L
5
0
Start-Up
Frequency vs Input Voltage
V
V
R
I
FCB = 0V
FIGURE 9 CIRCUIT
TH
FIGURE 9 CIRCUIT
IN
OUT
LOAD
CONTINUOUS
= 15V
Voltage vs Load Current
= 2.5V
= 0.25Ω
DISCONTINUOUS
MODE
10
MODE
INPUT VOLTAGE (V)
LOAD CURRENT (A)
5
I
OUT
I
50ms/DIV
OUT
15
= 10A
= 0A
10
20
1778 G05
1778 G07
1778 G19
1778fb
25
15