Overview
The LM2832YMY, produced by Texas Instruments, is a high-frequency, monolithic PWM step-down DC/DC converter. This regulator is designed to provide efficient and accurate local DC/DC conversion with a minimal number of external components. It features a high switching frequency, allowing the use of small surface mount inductors and capacitors, which results in a compact PCB design. The LM2832YMY is available in both 6-pin LLP and 8-pin eMSOP packages, making it versatile for various applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | 3.0 | - | 5.5 | V |
| Output Voltage Range | 0.6 | - | 4.5 | V |
| Output Current | - | - | 2.0 | A |
| Switching Frequency (LM2832Y) | 0.4 | 0.55 | 0.7 | MHz |
| Switch On Resistance | 150 | - | 240 | mΩ |
| Feedback Voltage | 0.584 | 0.600 | 0.616 | V |
| Undervoltage Lockout (VIN Rising) | 2.73 | 2.90 | - | V |
| Undervoltage Lockout (VIN Falling) | 1.85 | 2.3 | - | V |
| UVLO Hysteresis | - | - | 0.43 | V |
| Maximum Duty Cycle | - | - | 96 | % |
| Minimum Duty Cycle | - | - | 2 | % |
| Switch Current Limit | 2.4 | - | 3.25 | A |
Key Features
- High switching frequencies: 0.55 MHz for the LM2832Y model, allowing the use of small surface mount inductors and capacitors.
- Internal 150 mΩ PMOS switch using state-of-the-art 0.5 µm BiCMOS technology.
- Output voltage range of 0.6V to 4.5V.
- Current-mode control and internal compensation for high-performance regulation.
- Internal soft-start circuitry to reduce inrush current.
- Pulse-by-pulse current limit and thermal shutdown for protection.
- Output over-voltage protection.
- Ultra-low stand-by current of 30 nA.
- External shutdown control.
Applications
- Local 5V to Vcore step-down converters.
- Core power in hard disk drives (HDDs).
- Set-top boxes.
- USB powered devices.
- DSL modems.
Q & A
- What is the input voltage range of the LM2832YMY?
The input voltage range is from 3.0V to 5.5V.
- What is the output current capability of the LM2832YMY?
The LM2832YMY can deliver up to 2.0A of output current.
- What are the switching frequencies available for the LM2832YMY?
The LM2832Y model operates at a switching frequency of 0.55 MHz.
- What type of control mode does the LM2832YMY use?
The LM2832YMY uses current-mode control with internal compensation.
- Does the LM2832YMY have over-voltage protection?
Yes, the LM2832YMY includes output over-voltage protection.
- What is the purpose of the internal soft-start circuitry in the LM2832YMY?
The internal soft-start circuitry reduces inrush current during startup.
- What is the typical quiescent current of the LM2832YMY in standby mode?
The standby current is typically 30 nA.
- What are some common applications for the LM2832YMY?
Common applications include local 5V to Vcore step-down converters, core power in HDDs, set-top boxes, USB powered devices, and DSL modems.
- How does the LM2832YMY protect against thermal issues?
The LM2832YMY includes thermal shutdown to limit total power dissipation and protect the device.
- What types of capacitors are recommended for use with the LM2832YMY?
Surface mount capacitors such as X7R or X5R type multilayer ceramic capacitors (MLCC) are recommended due to their low ESL and suitable temperature characteristics.
