Figure 4-1. D or P Package, 8-…

Figure 4-1. D or P Package, 8-…

Texas InstrumentsUnited States

LM2675M-ADJ/NOPB

ActiveVoltage Regulators - DC DC Switching RegulatorsSOIC

IC REG BUCK ADJUSTABLE 1A 8SOIC

LM2675M-ADJ/NOPB is a 1A step-down DC-DC switching regulator with 8V-40V input, 1.21V-37V adjustable output, 260kHz switching frequency, 8-pin SOIC package, operating temperature -40°C to 125°C, featuring overChecked against the datasheet

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Technical parameters

Key specs

Input voltage8 ~ 40 V
Output voltage1.21 ~ 37 V
Output current1 AMax
Switching frequency260 kHz

Datasheet-verified parameters

20 items
ParameterValue and test conditionsSource
Input voltage range8V to 40V
Output voltage1.21V to 37V (adjustable version)
Output current1A
Switching frequency260kHz
PackageSOIC (D), 8-pin
Operating temperature-40°C to 125°C
GradeProduction
RoHSYes
Recommended operating conditions - Supply voltageMin: 6.5V, Max: 40V
Recommended operating conditions - Junction temperatureMin: -40°C, Max: 125°C
Absolute maximum ratings - Supply voltageMax: 45V
Absolute maximum ratings - Maximum junction temperatureMax: 150°C
Absolute maximum ratings - Storage temperatureMin: -65°C, Max: 150°C
Feedback voltageMin: 1.192V, Typ: 1.21V, Max: 1.228V (VIN=8V to 40V, ILOAD=20mA to 1A, VOUT programmed for 5V, TJ=25°C)
EfficiencyTyp: 90% (VIN=12V, ILOAD=1A)
ESD ratings±2000V (Human-body model, HBM)
Protection featuresThermal shutdown and current limit protection
External componentsRequires only 5 external components
Output voltage tolerance±1.5% maximum over line and load conditions
Shutdown capabilityTTL shutdown capability, low-power standby mode
All parameters (21)ExpandCollapse
Power
Current - Output1A
Voltage - Input (Max)40V
Voltage - Input (Min)6.5V
Voltage - Output (Max)37V
Voltage - Output (Min/Fixed)1.21V
AC and DC characteristics
Frequency - Switching260kHz
Environment and package
Mounting TypeSurface Mount
Operating Temperature-40°C~125°C(TJ)
PackageTube
Package / Case8-SOIC (0.154", 3.90mm Width)
Supplier Device Package8-SOIC
Other
Base Product NumberLM2675
FunctionStep-Down
MfrTexas Instruments
Number of Outputs1
Output ConfigurationPositive
Output TypeAdjustable
Product StatusActive
SeriesSIMPLE SWITCHER®
Synchronous RectifierNo
TopologyBuck

Pinout and package

Figure 4-1. D or P Package, 8-…
Figure 4-1. D or P Package, 8-…
Package: SOIC (D), 8-pin
PinNameFunctionSource
1CB- Boot-strap capacitor connection for high-side driver. Connect a high quality 470-nF capacitor from CB to VSW pin.
2NC- No connect pins.
3NC- No connect pins.
4FB- Feedback sense input pin. Connect to the midpoint of feedback divider to set VOUT for adjustable version or connect this pin directly to the output capacitor for a fixed output version.
5ON/OFF- Enable input to the voltage regulator. High = ON and low = OFF. Pull this pin high or float to enable the regulator.
6GND- Power ground pins. Connect to system ground. Ground pins of CIN and COUT. Path to CIN must be as short as possible.
7VIN- Supply input pin to collector pin of high side FET. Connect to power supply and input bypass capacitors CIN. Path from VIN pin to high frequency bypass CIN and GND must be as short as possible.
8VSW- Source pin of the internal High Side FET. This is a switching node. Attached this pin to an inductor and the cathode of the external diode.

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