UC1825VTD2集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF中文资料

UC1825VTD2属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由美国德州仪器公司制造生产的UC1825VTD2DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。

1FEATURES

• Rad-Tolerant: 30 kRad (Si) TID (1)

• Compatible With Voltage- or Current-Mode

Topologies

• Practical Operation Switching Frequencies

• 50-ns Propagation Delay-to-Output

• High-Current Dual Totem Pole Outputs

• Wide Bandwidth Error Amplifier

• Fully Latched Logic With Double-Pulse

Suppression

• Pulse-by-Pulse Current Limiting

• Soft Start/Maximum Duty-Cycle Control

• Undervoltage Lockout With Hysteresis

• Low Start-Up Current

DESCRIPTION

The UC1825-DIE PWM control device is optimized for high-frequency switched mode power supply applications.

Particular care was given to minimizing propagation delays through the comparators and logic circuitry while

maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either currentmode

or voltage mode systems with the capability for input voltage feed-forward.

Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and

a soft start pin which will double as a maximum duty-cycle clamp. The logic is fully latched to provide jitter-free

operation and prohibit multiple pulses at an output. An undervoltage lockout section with 800 mV of hysteresis

assures low start up current. During undervoltage lockout, the outputs are high impedance.

This device features totem pole outputs designed to source and sink high peak currents from capacitive loads,

such as the gate of a power MOSFET. The on state is designed as a high level.