LM2674M-3.3/NOPB National Semiconductor, LM2674M-3.3/NOPB Datasheet - Page 8
![IC REG SW 3.3V 500MA STPDN 8SOIC](/photos/6/56/65640/pkg_m08a_sml.jpg)
LM2674M-3.3/NOPB
Manufacturer Part Number
LM2674M-3.3/NOPB
Description
IC REG SW 3.3V 500MA STPDN 8SOIC
Manufacturer
National Semiconductor
Series
SIMPLE SWITCHER®r
Type
Step-Down (Buck)r
Datasheet
1.LM2674LD-3.3NOPB.pdf
(26 pages)
Specifications of LM2674M-3.3/NOPB
Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
3.3V
Current - Output
500mA
Frequency - Switching
260kHz
Voltage - Input
6.5 ~ 40 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Dc To Dc Converter Type
Step Down
Pin Count
8
Input Voltage
40V
Output Voltage
3.3V
Switching Freq
275kHz
Output Current
500mA
Efficiency
86%
Package Type
SOIC N
Output Type
Fixed
Switching Regulator
Yes
Mounting
Surface Mount
Input Voltage (min)
8V
Operating Temp Range
-40C to 125C
Operating Temperature Classification
Automotive
Package
8SOIC N
Minimum Input Voltage
8 V
Maximum Input Voltage
40 V
Switching Frequency
275 KHz
Operating Supply Voltage
6.5 to 40 V
Maximum Output Current
0.5 A
Primary Input Voltage
12V
No. Of Outputs
1
No. Of Pins
8
Operating Temperature Range
-40°C To +125°C
Msl
MSL 1 - Unlimited
Filter Terminals
SMD
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-
Lead Free Status / Rohs Status
Compliant
Other names
*LM2674M-3.3
*LM2674M-3.3/NOPB
LM2674M-3.3
Q1208191
Q745157
*LM2674M-3.3/NOPB
LM2674M-3.3
Q1208191
Q745157
www.national.com
Typical Performance
Characteristics
A: V
B: Inductor Current, 0.2 A/div
C: Output Ripple Voltage, 50 mV/div AC-Coupled
A: Output Voltage, 100 mV/div, AC-Coupled.
B: Load Current: 100 mA to 500 mA Load Pulse
SW
Load Transient Response for Continuous Mode
Pin Voltage, 10 V/div.
L = 100 µH, C
L = 100 µH, C
Continuous Mode Switching Waveforms
V
IN
Horizontal Time Base: 50 µs/div
Horizontal Time Base: 1 µs/div
= 20V, V
V
IN
OUT
OUT
= 20V, V
OUT
= 100 µF, C
= 100 µF, C
(Circuit of Figure 2)
= 5V, I
OUT
LOAD
= 5V,
OUT
OUT
= 500 mA
ESR = 0.1Ω
ESR = 0.1Ω
10004120
10004118
8
A: V
B: Inductor Current, 0.5 A/div
C: Output Ripple Voltage, 20 mV/div AC-Coupled
A: Output Voltage, 100 mV/div, AC-Coupled.
B: Load Current: 100 mA to 400 mA Load Pulse
SW
Load Transient Response for Discontinuous Mode
L = 15 µH, C
Pin Voltage, 10 V/div.
L = 47 µH, C
Discontinuous Mode Switching Waveforms
V
IN
Horizontal Time Base: 200 µs/div
Horizontal Time Base: 1 µs/div
= 20V, V
OUT
V
OUT
IN
= 68 µF (2x), C
= 20V, V
OUT
= 68 µF, C
= 5V, I
OUT
LOAD
OUT
= 5V,
OUT
ESR = 50 mΩ
= 300 mA
ESR = 25 mΩ
10004119
10004121