EL7520ILZ-T7 查看數據表（PDF） - Intersil

零件编号

产品描述 (功能)

生产厂家

EL7520ILZ-T7

4-Channel DC/DC Controller

Intersil 

EL7520, EL7520A

Over-Temperature Protection

An internal temperature sensor continuously monitor the die

temperature. In the event that the die temperature exceeds

the thermal trip point, the device will shut down. The upper

and lower trigger points are typically set to 130°C and -90°C

respectively.

Layout Recommendation

The device's performance including efficiency, output noise,

transient response and control loop stability is dramatically

affected by the PCB layout. PCB layout is critical, especially

at high switching frequency.

There are some general guidelines for layout:

1. Place the external power components (the input

capacitors, output capacitors, boost inductor and output

diodes, etc.) in close proximity to the device. Traces to

these components should be kept as short and wide as

possible to minimize parasitic inductance and resistance.

2. Place VREF and VDD bypass capacitors close to the pins.

3. Reduce the loop with large AC amplitudes and fast slew

rate.

4. The feedback network should sense the output voltage

directly from the point of load, and be as far away from LX

node as possible.

5. The power ground (PGND) and signal ground (SGND)

pins should be connected at only one point.

A demo board is available to illustrate the proper layout

implementation.

17

FN7318.0

July 12, 2005

Share Link: