ZSPM4022-09数据手册Renesas中文资料规格书

描述 Description

The ZSPM4022-09 is a constant-frequency, synchronous DC/DC buck regulator featuring adaptive on-time control architecture. The ZSPM4022-09 operates over a 4.5V to 19V supply range (12V typical). It has an internal linear regulator that provides a regulated 5V to power the internal control circuitry. The ZSPM4022-09 operates at a constant 600kHz (typical) switching frequency in continuous-conduction mode and can be used to provide up to 9A of output current. The output voltage is adjustable from 5.5V down to 0.8V.Under medium to heavy loads, the ZSPM4022-09 provides high efficiency and ultra-fast transient response via its rapid-control architecture. Under light load conditions, it maintains high efficiency and a superior transient response by transitioning to variable-frequency, discontinuous mode operation with its ultra-light-load architecture.The ZSPM4022-09 offers a full suite of protection features to ensure protection of the IC during fault conditions. These include under-voltage lockout to ensure proper operation under power-sag conditions; thermal shutdown; internal soft-start to reduce inrush current; foldback current limiting; and \"hiccup\" mode short-circuit protection. The ZSPM4022-09 includes a power good (PG) output to allow simple sequencing.

特性 Features

Rapid-control architecture enables operation with a high input/output voltage ratio (e.g., VIN = 19V and VOUT = 0.8V) and small output capacitance
Adjustable output voltage from 0.8V to 5.5V
Universally compatible with most output capacitors – stable with zero to high ESR
Power good (PG) output
Foldback current limiting and \"hiccup\" mode short-circuit protection
Safe start-up into pre-biased loads
Ultra-light load efficiency – up to 80% at 10mA
Up to 95% efficiency
Feedback reference accuracy as high as ±1%