MPQ4589-AEC1

MPQ4589-AEC1

90V, 0.8A, 9μA I_Q, Synchronous Step-Down DC/DC Converter, AEC-Q100 Qualified

概要

The MPQ4589-AEC1 is a synchronous step-down converter with integrated high-side and low-side MOSFETs (HS-FET and LS-FET, respectively) and a 9μA quiescent current (I_Q). It supports up to 0.8A of output current (I_OUT) with internal compensation.

High power conversion efficiency across a wide load range is achieved with power-save mode (PSM) and a low I_Q under light-load conditions to reduce switching and gate driver losses.

To achieve a small output voltage (V_OUT) ripple under light loads, pull the MODE/SYNC pin high for forced continuous conduction mode (FCCM). The switching frequency (f_SW) is always fixed to 400kHz under all load conditions.

Full protection features include over-current protection (OCP), short-circuit protection (SCP) with hiccup mode, output over-voltage protection (OVP), and over-temperature protection (OTP).

The MPQ4589-AEC1 is available in a QFN-19 (3mmx5mm) package, and is available in AEC-Q100 Grade 1.

機能と利点

4.5V to 90V Input Voltage (V_IN) Range
9μA Quiescent Current (I_Q)
Fixed 400kHz Switching Frequency (f_SW) with Frequency Dithering
Selectable Power-Save Mode (PSM)/Forced Continuous Conduction Mode (FCCM)
0.8V to 35V Output Voltage (V_OUT) Range
±1% Feedback (FB) Reference Accuracy at Junction Temperature (T_J) = 25°C
Supports Internal FB Resistor Divider for 5V/12V V_OUT via Trimming
V_OUT Discharge Function during Output Over-Voltage Protection (OVP) and Enable (EN) Shutdown
170mΩ/300mΩ Internal MOSFETs
Power Good (PG) Indication
VCC Voltage (V_CC) Power from BIAS (V_BIAS) if V_BIAS ≥ 4.25V for High Efficiency
Internal Loop Compensation and Soft Start (SS)
Output Over-Current Protection (OCP), OVP, and Thermal Shutdown Protection
Available in a QFN-19 (3mmx5mm) Package with Wettable Flanks
Available in AEC-Q100 Grade 1