- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382456 > RT9176 (Richtek Technology Corporation) 5.0 AMP POSITIVE VOLTAGE REGULATOR PDF資料下載
參數(shù)資料
| 型號(hào)： | RT9176 |
| 廠商： | Richtek Technology Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| 中文描述： | 5.0放大器正電壓穩(wěn)壓器 |
| 文件頁(yè)數(shù)： | 9/13頁(yè) |
| 文件大?。?/td> | 252K |
| 代理商： | RT9176 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)當(dāng)前第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)
RT9176
9
DS9176-11 March 2007
www.richtek.com
Application Information
Output voltage adjustment
Like most regulators, the RT9176 regulates the output by
comparing the output voltage to an internally generated
reference voltage. On the adjustable version as shown in
Figure 4, the V
REF
is available externally as 1.25V between
V
OUT
and ADJ. The voltage ratio formed by R1 and R2
should be set to conduct 10mA (minimum output load).
The output voltage is given by the following equation:
R
) + I
ADJ
R
2
V
OUT
= V
REF
(1+
1
2
R
On fixed versions of RT9176, the voltage divider is provided
internally.
Figure 4. Basic Adjustable Regulator
Input Bypass Capacitor
An input capacitor is recommended. A 10
μ
F tantalum on
the input is a suitable input bypassing for almost all
applications.
Adjust Terminal Bypass Capacitor
The adjust terminal can be bypassed to ground with a
bypass capacitor (C
ADJ
) to improve ripple rejection. This
bypass capacitor prevents ripple from being amplified as
the output voltage is increased. At any ripple frequency,
the impedance of the C
ADJ
should be less than R1 to
prevent the ripple from being amplified:
(2p * f
RIPPLE
* C
ADJ
) < R1
The R1 is the resistor between the output and the adjust
pin. Its value is normally in the range of 100-200
Ω
. For
example, with R1 = 124
Ω
and f
RIPPLE
= 120Hz, the C
ADJ
should be > 11
μ
F.
Output Capacitor
RT9176 requires a capacitor from V
OUT
to GND to provide
compensation feedback to the internal gain stage. This is
to ensure stability at the output terminal. Typically, 10
μ
F
tantalum or 50
μ
F aluminum electrolytic is sufficient and
please takes the notice of output capacitor ESR range
(Figure 5).
The output capacitor does not have a theoretical upper
limit and increasing its value will increase stability.
C
OUT
= 100
μ
F or more is typical for high current regulator
design.
VIN
VOUT
ADJ
RT9176
R1
R2
+
+
10uF
10uF
I
ADJ
V
REF
V
IN
V
OUT
65uA
+
C
ADJ
Load Regulation
When the adjustable regulator
is used (Figure 6), th
e best
load regulation is accomplished when the top of the resistor
divider (R1) is connected directly to the output pin of the
RT9176. When so connected, R
P
is not multiplied by the
divider ratio. For Fixed output version, the top of R1 is
internally connected to the output and ground pins can be
connected to low side of the load.
Figure 5
Region of Stable C
OUT
ESR vs. Load Current
10
C
OUT
= 100uF
0.01
0.1
1
0
0.2
0.4
0.6
0.8
1
Load Current (A)
C
O
)
C
OUT
= 10uF
Instable
Instable
Stable
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| RT9176-15GG | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| RT9176-15GL | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| RT9176-15GM | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| RT9176-15PG | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
| RT9176-15PL | 5.0 AMP POSITIVE VOLTAGE REGULATOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| RT9178-25GB | 功能描述:IC REG LDO 2.5V .2A SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:2.1V 輸入電壓:最高 7.5V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:5A（最小值） 電流 - 限制（最?。?5.1A 工作溫度:-40°C ~ 100°C 安裝類型:通孔 封裝/外殼:TO-220-5 供應(yīng)商設(shè)備封裝:TO-220-5 包裝:管件 配用:296-20624-ND - EVAL MOD FOR TPS72518 其它名稱:296-15154-5 |
| RT9178-26GB | 功能描述:IC REG LDO 2.6V .2A SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:2.1V 輸入電壓:最高 7.5V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:5A（最小值） 電流 - 限制（最?。?5.1A 工作溫度:-40°C ~ 100°C 安裝類型:通孔 封裝/外殼:TO-220-5 供應(yīng)商設(shè)備封裝:TO-220-5 包裝:管件 配用:296-20624-ND - EVAL MOD FOR TPS72518 其它名稱:296-15154-5 |
| RT9178-28PB | 制造商:Richtek 功能描述:200mA LDO Regulator |
| RT9178-2HGB | 功能描述:IC REG LDO 2.85V .2A SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:2.1V 輸入電壓:最高 7.5V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:5A（最小值） 電流 - 限制（最?。?5.1A 工作溫度:-40°C ~ 100°C 安裝類型:通孔 封裝/外殼:TO-220-5 供應(yīng)商設(shè)備封裝:TO-220-5 包裝:管件 配用:296-20624-ND - EVAL MOD FOR TPS72518 其它名稱:296-15154-5 |
| RT9178-30GB | 功能描述:IC REG LDO 3V .2A SOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):正，固定式 輸出電壓:2.1V 輸入電壓:最高 7.5V 電壓 - 壓降（標(biāo)準(zhǔn)）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:5A（最小值） 電流 - 限制（最?。?5.1A 工作溫度:-40°C ~ 100°C 安裝類型:通孔 封裝/外殼:TO-220-5 供應(yīng)商設(shè)備封裝:TO-220-5 包裝:管件 配用:296-20624-ND - EVAL MOD FOR TPS72518 其它名稱:296-15154-5 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。