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参数资料
| 型号： | RS5RM3828A-T1-FA |
| 厂商： | RICOH COMPANY LTD |
| 元件分类： | 稳压器 |
| 英文描述： | 0.25 A SWITCHING REGULATOR, 60 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | SOP-8 |
| 文件页数： | 28/29页 |
| 文件大小： | 585K |
| 代理商： | RS5RM3828A-T1-FA |
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8
RS5RM
–
+
–
+
LX Tr
LX
PWM
OSC
Vref1
Vref2
Pch Tr
VSS
100F
100H
VDD
VOUT
VIN
22F
1F
5
1
86
FIG. A Diagram of RS5RM including external circuits
OPERATION
1. VDD Output Voltage
VDD output voltage is shown in Fig. B.
(1) In the case of VIN–Vf
≥VDD0:
In Area B, LxTr is maintained in an OFF state, so that VIN–Vf (V) is output as it is from VDD pin without
step-up operation.
(2) In the case of VIN–Vf<VDD0:
In Area A, this IC functions as Step-up DC/DC converter. The step-up operation will now be explained with
reference to FIG. A. The step-up operation is an operation for regulating the VDD output voltage by com-
paring Vref1 and the VDD output voltage by error amplifier circuits and subjecting LxTr to on-time control
by PWM circuits (i.e., by controlling the step-up operation).
2. VOUT Output Voltage
A constant voltage is output from VOUT pin, with above-mentioned the VDD output voltage being subjected to a
step-down operation by a linear regulator. This step-down operation will now be explained with reference to FIG. A.
The step-down operation is an operation for regulating the VDD output voltage by Pch Tr by comparing Vref2 and
the VDD output voltage.
VIN
: Input Voltage
VDD0: VDD Set Voltage
VOUT0: VOUT Set Voltage
Vf
: ON Voltage of Diode
Area A
VDD0
VDD
Area B
VOUT
VDD0+Vf
1.2V
10V
Input Voltage (V)
Output
Voltage
(V)
VOUT0
FIG. B Output Voltage vs. Input Voltage characteristic
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相关代理商/技术参数 |
参数描述 |
|---|---|
| RS5RM4036A | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM4036A-T1 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM4036A-T2 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM4036B | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM4036B-T1 | 制造商:RICOH 制造商全称:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
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