EN5360DI 查看數據表（PDF） - Unspecified
零件编号
产品描述 (功能)
生产厂家
EN5360DI Datasheet PDF : 11 Pages
| |||
Rev 1.0 – July 2005
EN5360
PIN NAME
FUNCTION
37
38
39
40
41
VS2
Voltage select line 2 input. See Table 1.
42
ROCP Over-Current trip point adjust input. Used for adjusting the OCP trip point.
43
VS1
Voltage select line 1 input. See Table 1.
44
AVIN Analog voltage input for the controller circuits.
45
AGND Analog ground for the controller circuits.
46
VS0
Voltage select line 0 input. See Table 1.
47
POK
Power OK is an open drain transistor for power system state indication.
48
SS
Soft-Start node. A capacitor is connected between this pin and AGND.
NOTES:
5. This pin is used for engineering test purposes and reserved for future use. Solder, but do not electrically connect this pin to
the PCB.
Theory of Operation
Synchronous Buck Converter
The EN5360 is a synchronous, pin programmable
power supply with integrated power MOSFET
switches and inductor. The nominal input voltage
range is 2.5-5.0V. The output can be set to common
voltages by connecting appropriate combinations of 3
voltage selection pins to ground. If different voltage
levels are required, provision is also made to allow
external programming. The feedback control loop is
voltage-mode and the part uses a low-noise PWM
topology. Up to 6A of output current can be drawn
from this converter. The 5MHz operating frequency
enables the use of small-size output capacitors.
The power supply also has protection features such as:
• Programmable over-current protection (to
protect the IC from excessive load current)
• Thermal shutdown (to protect the converter
from getting too hot)
• Over-voltage protection that stops the PWM
switching and turns on the lower N-MOSFET
at 120% of the programmed output voltage in
order to protect the load from an OV
condition.
• Under-voltage lockout circuit to disable the
converter output when the input voltage is less
than approximately 2.2V
• Soft-start circuit, limiting the in-rush current
when the converter is powered up.
• Power good circuit indicating whether the
output voltage is within 90%-120% of the
programmed voltage.
Output Voltage Programming
The EN5360 output voltage is programmed using one
of two methods. Common output voltages are
achieved by tying one or more of the three Voltage
Select pins (VS0, VS1 & VS2) to ground (see Table
1). If all three are left floating, the output voltage and
over voltage thresholds are determined by the voltages
presented at the XFB and XOV pins respectively.
These voltages should be set by way of resistor
dividers between VOUT to AGND with the midpoint
going to XFB and XOV (See Figure 1).
Additional features include:
7
www.enpirion.com
Share Link: 