LTC3809EMSE-1 Linear Technology, LTC3809EMSE-1 Datasheet - Page 4

• Manufacturer Part Number: LTC3809EMSE-1
• Description: IC CTRLR DC/DC SYNC 10-MSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3809EMSE-1

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 0.6 ~ 9.8 V
• Current - Output: 1A
• Frequency - Switching: 550kHz
• Voltage - Input: 2.75 ~ 9.8 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP Exposed Pad, 10-HMSOP, 10-eMSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

LTC3809-1
TYPICAL PERFORMANCE CHARACTERISTICS
AC COUPLED
4
200mV/DIV
100
2A/DIV
95
90
85
80
75
70
65
60
V
OUT
1
Effi ciency vs Load Current
FIGURE 8 CIRCUIT
I
L
Load Step
(Burst Mode Operation)
V
V
V
I
MODE = V
FIGURE 8 CIRCUIT
LOAD
OUT
IN
OUT
= 3.3V
= 3.3V
= 1.8V
V
= 300mA TO 3A
10
OUT
LOAD CURRENT (mA)
IN
= 1.8V
100
100μs/DIV
Start-Up with Internal Soft-Start
(TRACK/SS = V
V
R
FIGURE 8 CIRCUIT
IN
LOAD
MODE = V
V
V
= 4.2V
V
IN
OUT
OUT
= 5V
= 1
= 1.2V
1k
= 2.5V
IN
38091 G01
200μs/DIV
38091 G04
IN
10k
)
AC COUPLED
200mV/DIV
100
2A/DIV
95
90
85
80
75
70
65
60
55
50
V
OUT
Effi ciency vs Load Current
I
1
FIGURE 8 CIRCUIT
V
L
IN
38091 G07
Load Step
(Forced Continuous Mode)
V
V
I
MODE = 0V
FIGURE 8 CIRCUIT
LOAD
IN
OUT
= 5V, V
BURST MODE
(MODE = V
= 3.3V
= 1.8V
= 300mA TO 3A
V
1.8V
500mV/DIV
OUT
10
OUT
LOAD CURRENT (mA)
= 2.5V
IN
)
100
100μs/DIV
PULSE SKIPPING
(MODE = 0.6V)
FORCED
CONTINUOUS
(MODE = 0V)
Start-Up with External Soft-Start
(C
V
R
FIGURE 8 CIRCUIT
1k
IN
LOAD
SS
= 4.2V
T
38091 G02
= 10nF)
= 1
A
38091 G05
= 25°C, unless otherwise noted.
10k
AC COUPLED
200mV/DIV
1ms/DIV
2A/DIV
100
–20
80
60
40
20
V
0
OUT
0.5
I
Maximum Current Sense Voltage
vs I
L
Load Step
(Pulse-Skipping Mode)
V
V
I
MODE = V
FIGURE 8 CIRCUIT
LOAD
IN
OUT
TH
= 3.3V
= 1.8V
Burst Mode OPERATION
(I
Burst Mode OPERATION
(I
FORCED CONTINUOUS
MODE
PULSE SKIPPING
MODE
Pin Voltage
= 300mA TO 3A
TH
TH
38091 G08
FB
RISING)
FALLING)
I
1
TH
VOLTAGE (V)
V
1.8V
500mV/DIV
OUT
100μs/DIV
1.5
38091 G03
38091fc
38091 G06
2