 LMR10510YMFENOPB device package |
 LMR10510YMFENOPB schematic symbol |
PWM DC-DC step-down converter ICs are an integral part of modern switch mode power supplies, power electronic circuits, and consumer electronic devices. There are a large number of electronic and power electronic circuits which require step-down or step-up DC-DC conversion. These DC-DC converters are widely used in laptops, set top boxes, TV sets, power supplies and other consumer electronic devices. The higher switching frequencies of these converters ensure efficient power conversion and minimum conversion losses. These DC-DC converter ICs provide variable and stable voltage and current to the loads.
What is LMR10510YMFE/NOPB？
The LMR10510YMFE/NOPB is a monolithic high-frequency regulator with built in PWM step-down DC-DC converter. This PWM DC-DC converter based regulator is developed by Texas Instruments. The regulator comes in a 5 pin SOT-23 package. This regulator IC is compact in size and requires minimum external components. The device houses a 130 Ohm PMOS switch which can drive loads up to 1A. The advanced control circuit provides on-times as low as 30ns which ensures high frequency operation. The default switching frequency of the regulator is set to 3MHz. Despite of high frequency operation, the device boasts an impressive efficiency of 90%. The device features current mode control and internal compensation in order to provide high performance regulation over a wide range of operating conditions. The device includes advanced internal circuitry for soft start current limiter, thermal shutdown, and over-voltage protection.
Pin Configuration
The pin configuration of the LMR10510YMFE/NOPB PWM DC-DC regulator is given in the table below:
| Pin name | Pin description |
| GND | Signal and power ground. |
| Vin | Input supply voltage |
| SW | Switch node |
| FB | Feedback pin. |
| EN | Enable control input. Active high. |
Features
- 3-5.5V input voltage range
- Output voltage range of 0.6-4.5V
- Output current up to 1A
- 3MHz default switching frequency
- Internal soft starter
- Current mode PWM operation
- Thermal shutdown
- Over voltage protection
- Tiny footprint and low cost
- SOT-23 package
Applications
The applications of LMR10510YMFE/NOPB step-down DC-DC converter are provided as following:
- Point of load conversions from 3.3V and 5V rails
- Compact and constrained space applications
- Battery powered electronic devices
- Industrial distributed power applications
- Power metering solutions
- Portable and handheld devices
Specifications
The major technical specifications of the LMR10510YMFE/NOPB are provided as following:
- Terminals: 5
- Package: SOT-23
- Input voltage range: 3V-5.5V
- Output voltage range: 0.6V-4.5V
- Max output current: 1A
- Switching frequency: 3MHz
- Software support: WEBENCH Power Designer
How LMR10510YMFE/NOPB work?
There are basically two main types of voltage regulators which are fixed-voltage and variable-voltage regulators. The LMR10510YMFE/NOPB is a variable voltage regulator from Texas Instruments which features a PWM step-down DC-DC converter to achieve the voltage step-down function. These regulators are widely used in switch mode power supplies, smart wearable devices, handheld instruments, and industrial electronic equipment. The typical application circuit of this 5-pin regulator IC is given in the figure below:
LMR10510YMFENOPB application circuit
LMR10510YMFE/NOPB Related Products Prices
LMR10510YMFE/NOPB
Parts Mfr. Description Stock Prices Buy Now
Texas Instruments IC REG BUCK ADJ 1A SOT23-5 250 RFQ 
LMR10510YMFX/NOPB Texas Instruments IC REG BUCK ADJ 1A SOT23-5 1 $0.713 Lowest 
LMR10510YMFX Texas Instruments IC REG BUCK ADJ 1A SOT23-5 1 $0.662 Lowest
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