LTC3642IMS8E-5#TRPBF Linear Technology, LTC3642IMS8E-5#TRPBF Datasheet - Page 17

• Manufacturer Part Number: LTC3642IMS8E-5#TRPBF
• Description: IC DC/DC CONV HE/HV 5V 8-MSOP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC3642IMS8E-5#TRPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 5V
• Current - Output: 50mA
• Voltage - Input: 4.5 ~ 45 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP Exposed Pad, 8-HMSOP, 8-eMSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Frequency - Switching: -

TYPICAL APPLICATIONS
5V TO 45V
4.5V TO 24V
3.3V, 50mA Regulator with Peak Current Soft-Start, Small Size
4.5V TO 33V
V
IN
V
IN
V
IN
0.1µF
C
SS
C
4.7µF
Figure 11. High Efficiency 5V Regulator
IN
C
C
L1: TDK SLF7045T-221MR33-PF
C
1µF
IN
OUT
IN
C
C
L1: TAIYO YUDEN CBC2518T470K
C
1µF
R
: TDK C5750X7R2A475MT
IN
OUT
IN
SET
: AVX 1812D107MAT
Positive-to-Negative Converter
: TDK C3216X7R1E105KT
: AVX 08056D106KAT2A
V
RUN
I
SS
V
RUN
HYST
I
SET
C
C
L1: TYCO/COEV DQ6530-101M
SET
IN
V
RUN
I
HYST
IN
IN
OUT
SET
LTC3642
IN
LTC3642
: TDK C3225X7R1H105KT
LTC3642
GND
GND
: MURATA GRM32DR71C106KA01
GND
HYST
SW
V
V
SW
FB
SS
SW
V
FB
SS
FB
220µH
47µH
L1
100µH
L1
L1
3642 F11a
C
47nF
SS
R1
294k
R2
93.1k
R1
4.2M
R2
800k
3642 TA02a
R1
1M
R2
71.5k
C
10µF
C
100µF
OUT
C
10µF
OUT
3642 TA04a
OUT
V
–12V
OUT
V
3.3V
50mA
V
5V
OUT
OUT
INDUCTOR CURRENT
OUTPUT VOLTAGE
20mA/DIV
94
93
92
90
88
Maximum Load Current vs Input Voltage
91
89
50
45
40
35
30
25
20
15
10
1V/DIV
1
5
V
IN
10
= 10V
Efficiency vs Load Current
R
SET
15
= 500k
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
V
20
OUT
R
Soft-Start Waveforms
SET
= –3V
10
25
I
= 750k
SET
V
V
OUT
OUT
30
OPEN
2ms/DIV
= –12V
= –5V
35
40
LTC3642
3642 F11b
3642 TA04b
100
45
3642 TA03b
17
3642fc