LT3991EMSE#PBF Linear Technology, LT3991EMSE#PBF Datasheet - Page 5

• Manufacturer Part Number: LT3991EMSE#PBF
• Description: IC BUCK SYNC ADJ 1.2A 10MSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LT3991EMSE#PBF

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.19 ~ 30 V
• Current - Output: 1.2A
• Frequency - Switching: 200kHz ~ 2MHz
• Voltage - Input: 4.3 ~ 55 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP Exposed Pad, 10-HMSOP, 10-eMSOP
• Primary Input Voltage: 12V
• No. Of Outputs: 1
• Output Voltage: 30V
• Output Current: 1.2A
• No. Of Pins: 10
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 1 - Unlimited
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

TYPICAL PERFORMANCE CHARACTERISTICS
1000
950
900
850
800
750
700
650
600
700
600
500
400
300
200
100
3.0
2.5
2.0
1.5
1.0
0.5
0
0
–55
5
0
Switching Frequency
Maximum Load Current
Switch V
V
OUT
10
–25
250
= 3.3V
15
SWITCH CURRENT (mA)
CESAT
20
5
INPUT VOLTAGE (V)
TEMPERATURE (°C)
500
TYPICAL
25 30 35 40 45 50
35
750
MINIMUM
65
1000
95
1250
125
3991 G08
3991 G11
3991 G14
1500
155
55
2.5
2.0
1.5
1.0
0.5
3.0
2.5
2.0
1.5
1.0
0.5
45
40
35
30
25
20
15
10
0
0
5
0
0
5
0
Switch Current Limit
Boost Pin Current
Maximum Load Current
V
OUT
10
250
= 5V
20
15
SWITCH CURRENT (mA)
20
INPUT VOLTAGE (V)
500
DUTY CYCLE (%)
TYPICAL
25 30 35 40 45 50
40
750
LT3991/LT3991-3.3/LT3991-5
60
MINIMUM
1000
80
1250
T
3991 G09
3991 G12
3991 G15
A
1500
= 25°C, unless otherwise noted.
100
55
–0.05
–0.10
–0.15
–0.20
–0.25
–0.30
0.30
0.25
0.20
0.15
0.10
0.05
900
800
700
600
500
400
300
200
100
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
0
0
–55
0
0
Load Regulation
Switch Current Limit
LT3991 Frequency Foldback
REFERENCED FROM V
DUTY CYCLE = 30%
–25
200
0.2
LOAD CURRENT (mA)
5
TEMPERATURE (°C)
FB PIN VOLTAGE (V)
400
0.4
35
600
0.6
OUT
65
AT 0.5A LOAD
800
0.8
95
1000
125
1
3991 G10
3991 G13
3991 G16
3991fa
5
1200
155
1.2