L5964集成電路（IC）的線性穩(wěn)壓器控制器規(guī)格書PDF中文資料

L5964屬于集成電路（IC）的線性穩(wěn)壓器控制器。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的L5964穩(wěn)壓器 - 線性 + 開關(guān)此產(chǎn)品族中的產(chǎn)品用于構(gòu)建執(zhí)行 DC-DC 轉(zhuǎn)換或電壓調(diào)節(jié)功能的電路，采用的是開關(guān)模式和線性穩(wěn)壓器功能的組合。雖然具體的拓?fù)涓鞑幌嗤?，但此類產(chǎn)品的主要目的是將開關(guān)模式技術(shù)的效率優(yōu)勢與線性穩(wěn)壓技術(shù)的低噪聲特性結(jié)合在一起。

Features

? AEC-Q100 qualified

? Two step-down synchronous switching voltage

regulators with internal power switches:

– Output voltage selectable by external

divider (feedback voltage at 0.9 V)

– Minimum and maximum output is limited by

minimum and maximum duty cycle

– Internal high-side/ low-side NDMOS

– 270 kHz and 2.2 MHz selectable free-run

frequencies

– 125 kHz < f < 2.3 MHz synchronization

range at SYNCIN pin

– Programmable current limits at 2 A and

3.5A (> 2 A requires the addition of external

schottky diodes)

– Independent hardware enabling pins

– Independent supply inputs

– 180° phase shift between outputs

– Synch out 90° phase shift vs DC-DC1

– Programmable switching frequency divider

by 1, 2, 4, 8 between the two regulators

– The two buck converters can be connected

in parallel (for evaluation purposes only)

? Independent voltage supervisors/power-goods

with selectable thresholds through external pin:

– two available thresholds for UV/OV/PG

signals: 90-120-95 or 80-110-85

(output voltage percentage)

? Soft-start, thermal protection

? One standby/linear regulator:

– Output selectable with external resistor

divider till 10 V

– Soft start, hardware enable pin

– 250 mA maximum current capability

– Standby operative mode

– Programmable power good thresholds

(85 or 95 output voltage percentage)

– Thermal protection

? Microcontroller reset with programmable

duration, activated by output under voltage or

watchdog fault

? External High Side Driver enable pin

? One integrated window watchdog (5 ms ≤

window ≤ 50 ms, with ± 20 tolerance)

? Short circuit protected outputs

? Low external components number

? Thermal shutdown junction temperature 150°C