The MAX15035 pulse-width modulation (PWM) controller
provides high efficiency, excellent transient response,
and high DC-output accuracy. Combined with the internal
low on-resistance MOSFETs, the MAX15035 provides
a highly efficient and compact solution for small
form factor applications that need a high-power density.
Maxim’s proprietary Quick-PWM? quick-response,
constant on-time PWM control scheme handles wide
input/output voltage ratios (low-duty-cycle applications)
with ease and provides 100ns instant-on response to
load transients while maintaining a relatively constant
switching frequency. The output voltage can be dynamically
controlled using the dynamic REFIN, which supports
input voltages between 0V to 2V. The REFIN
adjustability combined with a resistive voltage-divider
on the feedback input allows the MAX15035 to be configured
for any output voltage between 0V to 0.9VIN.
The controller senses the current across the synchronous
rectifier to achieve a low-cost and highly efficient
valley current-limit protection. External current-limit control
is provided to allow higher current-limit settings for
applications with heatsinks and air flow, or for lower
current applications that need lower current-limit settings
to avoid overdesigning the application circuit. The
adjustable current limit provides a high degree of flexibility,
allowing thermally compensated protection or
foldback current-limit protection using a voltage-divider
partially derived from the output.
The MAX15035 includes a voltage-controlled soft-start
and soft-shutdown to limit the input surge current, provide
a monotonic power-up into a precharged output,
and provide a predictable soft-start time. The controller
also includes output fault protection—undervoltage and
overvoltage protection—as well as thermal-fault protection.
The MAX15035 is available in a small 40-pin, 6mm x 6mm,
TQFN package.

MAX15035脈寬調制(PWM)控制器具有高效率、出色的瞬態響應和極高的直流輸出精度。與內部低導通電阻MOSFET相結合，MAX15035能夠為大功率密度的小外型應用提供高效緊湊的解決方案。

Maxim專有的Quick-PWM?快速響應、固定導通時間PWM控制架構可輕松應對寬輸入/輸出電壓比(低占空比)，并對負載瞬變提供100ns的快速瞬態響應，并可保持相對固定的開關頻率。采用動態REFIN能夠動態控制輸出電壓，該動態電壓支持0V至2V輸入范圍。REFIN調節與反饋輸入端的電阻分壓器相結合，可將MAX15035輸出電壓設置在0V至0.9V_IN之間。

控制器檢測流過同步整流器的電流，從而實現低成本、高效谷電流限制保護。外部限流控制允許設置較高的電流門限，用于需要散熱和空氣流通的設備，或用于需要較低限流門限以避免超安全標準設計的低電流應用場合。可調節的限流閥值提高了設計靈活性，通過采用輸出分壓方式能夠實現熱補償保護或折返式限流保護。

MAX15035包含電壓控制的軟啟動和軟關斷，有效抑制輸入浪涌電流，保證單調上電并進入預充電壓，可預置軟啟動時間。該控制器還具有輸出故障保護功能(欠壓和過壓)以及熱保護功能。

MAX15035采用小尺寸40引腳、6mm x 6mm、TQFN封裝。