MP5516N

MP5516N

Wide 2.65V to 16V Input, 6A, High-Efficiency, Power Loss Protection PMIC with Integrated E-Fuse

概要

The MP5516N is a monolithic power management system designed to manage energy storage and backup release in enterprise solid-state drives (SSDs). It integrates a current-limited, reverse-current protected input power switch (e-fuse), an autonomous buck-boost energy storage and release converter, and storage capacitance (C_STRG) health monitoring.

The configurable storage voltage (V_STRG), backup release, and system output bus voltages enable flexible design. An onboard analog-to-digital converter (ADC) provides real-time monitoring of many power system parameters via the I²C.

The configurable input current limit switch (I_{LIMIT_E-FUSE}) limits inrush current during system start-up. Reverse-current blocking prevents backup energy from flowing to the failing input source. The energy storage/release converter’s configurable switching frequency (f_SW) and charging current optimizes the external component value and size tradeoffs in design.

Seamless energy release transition is achieved using the internal logic. Constant-on-time (COT) control in the buck topology ensures steady regulation during energy release. The buck-boost energy storage/release converter requires only a single inductor to operate.

Onboard multiple-time programmable (MTP) memory allows the user to store system operating parameters specific to a product assembly, such as the input current (I_IN) limit, capacitor health check start and stop values, and discharge current. These parameters can be adjusted in system through the I²C interface. The onboard 8-bit ADC can be used to monitor the input voltage (V_IN) and I_IN in real time.

The MP5516N requires a minimal number of readily available, standard external components, and is available in a QFN-25 (4mmx4mm) package.

機能と利点

Input Current Limit Switch (I_{LIMIT_E-FUSE}):
- Wide 2.65V to 16V Input Voltage (V_IN)
- 20mΩ On Resistance (R_DS(ON)) Switch for E-Fuse
- 1.2A to 6A Configurable I_{LIMIT_E-FUSE}
- Selectable 3.3V, 5V, or 12V Under-Voltage Lockout (UVLO) and Over-Voltage Protection (OVP)
- Reverse-Current Blocking at Input to Prevent Current Leakage
- Configurable Soft-Start Time (t_DVDT)
- Configurable Power-On Reset (POR) Delay Time (t_TPOR)
36V Charge and Backup Converter:
- Up to 36V Configurable Storage Voltage (V_STRG)
- 60mΩ/37mΩ R_DS(ON) for High-Side MOSFET (HS-FET) and Low-Side MOSFET (LS-FET), Respectively
- Configurable Boost Charge Current
- Boost Charge Mode and Buck Release Mode Auto-Alternating via Configured System Voltage Regulation Level
- Constant-On-Time (COT) Control for Steady-State Operation in Buck Release Mode with Configurable Switching Frequency (f_SW)
- 5A Valley Current Limit during Buck Release
- Short-Circuit Protection (SCP) for Both the Load Side and Energy Storage Side
- Storage Capacitance (C_STRG) Detection

System:

Multiple-Time-Programmable (MTP) Memory Up to 1,000 Times
8-Bit Analog-to-Digital Converter (ADC) to Monitor V_IN and Input Current (I_IN)
Digital I²C for Status Monitoring, and Parameter and Operation Control
Enable (EN) Control
Available in a Compact QFN-25 (4mmx4mm) Package