LM20343MH/NOPB National Semiconductor, LM20343MH/NOPB Datasheet - Page 18
![IC REG SYNC BUCK 3A 20TSSOP](/photos/6/93/69337/pkg_mxa20a_sml.jpg)
LM20343MH/NOPB
Manufacturer Part Number
LM20343MH/NOPB
Description
IC REG SYNC BUCK 3A 20TSSOP
Manufacturer
National Semiconductor
Series
PowerWise®r
Type
Step-Down (Buck)r
Datasheet
1.LM20343MHNOPB.pdf
(20 pages)
Specifications of LM20343MH/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
0.8 ~ 32 V
Current - Output
3A
Frequency - Switching
250kHz, 750kHz
Voltage - Input
4.5 ~ 36 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
Primary Input Voltage
36V
No. Of Outputs
1
Output Voltage
32V
Output Current
3A
No. Of Pins
20
Operating Temperature Range
-40°C To +125°C
Msl
MSL 1 - Unlimited
Filter Terminals
SMD
Rohs Compliant
Yes
For Use With
LM20343EVAL - EVALUATION BOARD FOR THE LM20343
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Other names
*LM20343MH
*LM20343MH/NOPB
LM20343MH
*LM20343MH/NOPB
LM20343MH
www.national.com
Bill of Materials (V
C2, C3
C5, C6
R1, R5
U1
C1
C4
C7
C8
C9
D1
R2
R3
R4
L1
ID
Qty
1
1
2
1
1
1
1
1
1
1
2
1
1
1
GRM21BR61E475KA12L
C3225X5R1E226M
C1608X7R1H104K
C1608X5R1A105K
C1608C0G1H100J
C1608C0G1H102J
MSS1048-472NLB
CMMSH1-40-NST
CRCW06031002F
CRCW06034992F
CRCW06034992F
CRCW06033092F
IN
6TPB150MAZB
Part Number
LM20343MH
= 12V, V
FIGURE 14. Typical Application Schematic
OUT
= 3.3V, I
eTSSOP-20
MSS1048
SOD123
1210
0805
0603
0603
0603
0603
0603
0603
0603
0603
Size
18
B
OUT
= 3A, f
Vr = 40V, Io = 1A, Vf = 0.55V
150µF,POSCAP, 6.3V, 20%
4.7µH, 0.012 Ohms, 6.4A
IC, Switching Regulator
100nF, X7R, 50V, 10%
4.7µF, X5R, 25V, 10%
22µF, X5R, 25V, 20%
10pF, C0G, 50V, 5%
1µF, X7R, 10V, 10%
1nF, C0G, 50V, 5%
Description
49.9kΩ, 1%
49.9kΩ, 1%
30.9kΩ, 1%
SW
10kΩ, 1%
= 750 kHz)
Semiconductor
Coilcraft
Vendor
MuRata
Central
Vishay
Vishay
Vishay
Vishay
Sanyo
30051744
NSC
TDK
TDK
TDK
TDK
TDK