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參數(shù)資料
| 型號(hào)： | RS5RM3329B-T2 |
| 廠商： | RICOH COMPANY LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| 中文描述： | 0.25 A SWITCHING REGULATOR, 60 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | SOP-8 |
| 文件頁數(shù)： | 9/30頁 |
| 文件大?。?/td> | 213K |
| 代理商： | RS5RM3329B-T2 |
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8
RS5RM
–
+
–
+
L
X
Tr
L
X
PWM
OSC
Vref1
Vref2
Pch Tr
V
SS
100μF
100μH
V
DD
V
OUT
V
OUT
V
IN
22μF
1μF
5
1
8
6
FIG. A Diagram of RS5RM including external circuits
OPERATION
1. V
DD
Output Voltage
V
DD
output voltage is shown in Fig. B.
(1) In the case of V
IN
–Vf
≥
V
DD
0:
In Area B, LxTr is maintained in an OFF state, so that V
IN
–Vf (V) is output as it is from V
DD
pin without
step-up operation.
(2) In the case of V
IN
–Vf<V
DD
0:
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 V
DD
output voltage by com-
paring Vref1 and the V
DD
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. V
OUT
Output Voltage
A constant voltage is output from V
OUT
pin, with above-mentioned the V
DD
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 V
DD
output voltage by Pch Tr by comparing Vref2 and
the V
DD
output voltage.
V
IN
V
DD
0
V
OUT
0
Vf
: Input Voltage
: V
DD
Set Voltage
: V
OUT
Set Voltage
: ON Voltage of Diode
Area A
V
DD
0
V
DD
Area B
V
OUT
V
DD
0+Vf
1.2V
10V
Input Voltage (V)
O
V
OUT
0
FIG. B Output Voltage vs. Input Voltage characteristic
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RS5RM5045A-T1 | PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM3329A-T1 | PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM3329A-T2 | PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM5045A-T2 | ; Leaded Process Compatible:No; Peak Reflow Compatible (260 C):No |
| RS5RM3027A | PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RS5RM3531A | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM3531A-T1 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM3531A-T2 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM3531B | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
| RS5RM3531B-T1 | 制造商:RICOH 制造商全稱:RICOH electronics devices division 功能描述:PWM STEP-UP DC/DC CONVERTER WITH VOLTAGE REGULATOR AND DETECTOR |
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