LTC1628IG-PG Linear Technology, LTC1628IG-PG Datasheet - Page 7

• Manufacturer Part Number: LTC1628IG-PG
• Description: IC REG SW 2PHASE STEPDOWN 28SSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1628IG-PG

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: Adj to 0.8V
• Current - Output: 3A
• Frequency - Switching: 220kHz
• Voltage - Input: 3.5 ~ 30 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

TYPICAL PERFOR A CE CHARACTERISTICS
200mV/DIV
10V/DIV
10V/DIV
2A/DIV
31
25
35
33
29
27
V
V
–50 –25
SW1
SW2
V
I
Current Sense Pin Input Current
vs Temperature
IN
IN
V
OUT
Input Source/Capacitor
Instantaneous Current (Figure 13)
V
V
I
OUT5
IN
OUT
= 5V
= 15V
= 5V
= I
OUT3.3
0
TEMPERATURE ( C)
3.50
3.45
3.20
= 2A
3.40
3.35
3.30
3.25
25
–50
Undervoltage Lockout
vs Temperature
1 s/DIV
50
–25
75
W
0
TEMPERATURE ( C)
100
1628 G26
25
U
125
1628 G22
50
75
20mV/DIV
0.5A/DIV
10
V
6
0
8
4
2
100
I
OUT
OUT
–50 –25
EXTV
vs Temperature
1628 G29
Burst Mode Operation (Figure 13)
V
V
V
I
OUT
IN
OUT
FCB
125
= 15V
CC
= 20mA
= OPEN
= 5V
Switch Resistance
0
TEMPERATURE ( C)
25
10 s/DIV
50
75
4.5
4.0
3.5
3.0
2.5
2.0
1.0
1.5
0.5
0
100
–50
Shutdown Latch Thresholds
vs Temperature
1628 G27
LTC1628/LTC1628-PG
1628 G23
125
–25
0
TEMPERATURE ( C)
20mV/DIV
0.5A/DIV
THRESHOLD
350
200
150
100
300
250
LATCHOFF
25
V
50
I
0
OUT
OUT
– 50
Oscillator Frequency
vs Temperature
LATCH ARMING
V
V
V
I
50
Constant Frequency (Burst Inhibit)
Operation (Figure 13)
OUT
IN
OUT
FCB
– 25
= 15V
= 20mA
= 5V
= 5V
75
0
TEMPERATURE ( C)
100
1628 G30
V
25
FREQSET
V
V
FREQSET
FREQSET
125
2 s/DIV
50
= OPEN
= 5V
= 0V
75
100
1628 G28
1628fb
7
1628 G24
125