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R1234D 数据表(PDF) 4 Page - RICOH electronics devices division

部件名 R1234D
功能描述  PWM/VFM Step-Down DC/DC CONVERTER with Synchronous Rectifier
Download  26 Pages
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制造商  RICOH [RICOH electronics devices division]
网页  http://www.ricoh.com
标志 RICOH - RICOH electronics devices division

R1234D 数据表(HTML) 4 Page - RICOH electronics devices division

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R1234D
4
PIN CONFIGURATIO
SON-8
8 7 6 5
1 2 3 4
5 678
4 321
∗ ∗
Bottom View
Top View
PIN DESCRIPTION
Pin No
Symbol
Pin Description
1
VIN
Voltage Supply Pin
2
PGND
Power Ground Pin
3
VDD
Voltage Supply Pin
4
CE
Chip Enable Pin (active with "H")
5
VOUT/VFB
Output/Feedback Pin
6
MODE
Mode changer Pin ("L"
=PWM, "H"=VFM)
7
AGND
Analogue Ground Pin
8
LX
LX Pin (CMOS)
* Tab in the
parts have GND level. (They are connected to the reverse side of this IC.)
Do not connect to other wires or land patterns.
ABSOLUTE MAXIMUM RATINGS
Symbol
Item
Rating
Unit
VIN
VIN Supply Voltage
6.5
V
VDD
VDD Pin Voltage
6.5
V
VLX
LX Pin Voltage
−0.3 to VIN +0.3
V
VCE
CE Pin Input Voltage
−0.3 to VIN +0.3
V
VMODE
MODE Pin Input Voltage
−0.3 to VIN +0.3
V
VFB
VFB Pin Input Voltage
−0.3 to VIN +0.3
V
ILX
LX Pin Output Current
−0.8
A
PD
Power Dissipation (SON-8)
480
mW
Topt
Operating Temperature Range
−40 to +85
°C
Tstg
Storage Temperature Range
−55 to +125
°C
* ) For Power Dissipation, please refer to PACKAGE INFORMATION to be described.


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