參數(shù)資料
型號(hào)： MCZ34701EWR2
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： 1.5A Switch-Mode Power Supply with Linear Regulator
中文描述： 1.5A的開(kāi)關(guān)模式電源，線性穩(wěn)壓器
文件頁(yè)數(shù)： 4/39頁(yè)
文件大小： 528K
代理商： MCZ34701EWR2
Analog Integrated Circuit Device Data
Freescale Semiconductor
4
34701
PIN CONNECTIONS
20
CS
Current Sense
Current sense pin of the LDO. Over-current protection of the linear regulator external
power MOSFET. The voltage drop over the LDO current sense resistor RS is sensed
between the CS and LDO pins. The LDO current limit can be adjusted by selecting
the proper value of the current sensing resistor RS.
21
LDRV
Linear Drive
LDO gate drive of the external pass N-channel MOSFET.
22
VIN1
Input Voltage 1
The input supply pin for the integrated circuit. The internal circuits of the IC are
supplied through this pin.
23
VDDI
Power Supply
Internal supply voltage. A ceramic low ESR 1uF 6V X5R or X7R capacitor is
recommended.
26
ADDR
Address
I
2
C address selection. This pin can either be left open, tied to VDDI, or grounded
through a 10k
resistor.
27
EN1
Enable 1
Enable 1 Input. The combination of the logic state of the Enable 1 and Enable 2
inputs determines operation mode and type of power sequencing of the IC.
28
EN2
Enable 2
Enable 2 Input. The combination of the logic state of the Enable 1 and Enable 2
inputs determines operation mode and type of power sequencing of the IC.
29
RT
Reset Timer
This pin allows programming of the power-ON reset delay by means of an external
RC network.
30
RST
Reset Output
(Active LOW)
The reset control circuit monitors both the switching regulator and the LDO feedback
voltages. It is an open drain output and has to be pulled up to some supply voltage
(e.g., the output of the LDO) by an external resistor.
31
CLKSEL
Clock Selection
This pin sets the CLKSYN pin as either an oscillator output or a synchronization input
pin. The CLKSEL pin is also used for the I
2
C address selection.
32
CLKSYN
Clock Synchronization
Oscillator output/synchronization input pin.
Table 1. Pin Function Description (continued)
A functional description of each pin can be found in the
FUNCTIONAL PIN DESCRIPTION
section beginning on
page 16
.
Pin
Pin Name
Formal Name
Definition
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