- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376326 > RT9182ACE (Electronic Theatre Controls, Inc.) DUAL, LOW-NOISE, 200mA LDO REGULATOR PDF資料下載
參數(shù)資料
| 型號： | RT9182ACE |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | DUAL, LOW-NOISE, 200mA LDO REGULATOR |
| 中文描述： | 雙通道，低噪聲，200mA的LDO穩(wěn)壓器 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大小： | 212K |
| 代理商： | RT9182ACE |
Preliminary
RT9182
DS9182-02 April 2002
www.richtek-ic.com.tw
7
Applications Information
Capacitor Selection and Regulator Stability
Like any
capacitors used with the RT9182 must be carefully
selected for regulator stability and performance.
low-dropout
regulator,
the
external
Using a capacitor whose value is > 1
μ
F on the
RT9182 input and the amount of capacitance can be
increased without limit. The input capacitor must be
located a distance of not more than 0.5" from the
input pin of the IC and returned to a clean analog
ground. Any good quality ceramic or tantalum can be
used for this capacitor. The capacitor with larger
value and lower ESR (equivalent series resistance)
provides better PSRR and line-transient response.
The output capacitor must meet both requirements
for minimum amount of capacitance and ESR in all
LDO applications (see Fig.1). The RT9182 is
designed specifically to work with low ESR ceramic
output capacitor in space-saving and performance
consideration. Using a ceramic capacitor whose
value is at least 1
μ
F with ESR is > 5m
on the
RT9182 output ensures stability. The RT9182 still
works well with output capacitor of other types due to
the wide stable ESR range. Output capacitor of larger
capacitance can reduce noise and improve load-
transient response, stability, and PSRR. The output
capacitor should be located not more than 0.5"
from the V
OUT
pin of the RT9182 and returned to a
clean analog ground.
Note that some ceramic dielectrics exhibit large
capacitance and ESR variation with temperature. It
may be necessary to use 2.2
μ
F or more to ensure
stability at temperatures below -10°C in this case.
Also, tantalum capacitors, 2.2
μ
F or more may be
needed to maintain capacitance and ESR in the
stable region for strict application environment.
Tantalum capacitors maybe suffer failure due to
surge current when it is connected to a low-
impedance source of power (like a battery or very
large capacitor). If a tantalum capacitor is used at the
input, it must be guaranteed to have a surge current
rating
manufacture.
sufficient
for
the
application
by
the
Use a 10nF bypass capacitor at BP pin for low output
voltage noise. The capacitor, in conjunction with an
internal resistor, which connects bypass pin and the
band-gap reference, creates a low-pass filter for
noise reduction. Increasing the capacitance will
slightly decrease the output noise, and it is almost
independent of the start-up time. The capacitor
connected to the bypass pin for noise reduction must
have very low leakage. This capacitor leakage
current causes the output voltage to decline by a
proportional amount to the current.
Load-Transient Considerations
The RT9182 load-transient response graphs show
two components of the output response: a DC shift
from the output impedance due to the load current
change, and the transient response. The DC shift is
quite small due to the excellent load regulation of the
IC. Typical output voltage transient spike for a step
change in the load current from 0mA to 50mA is tens
mV, depending on the ESR of the output capacitor.
Increasing
the
output
decreasing the ESR attenuates the overshoot.
capacitor’s
value
and
Fig. 1
C
OUT
= 4.7
μ
F
C
OUT
= 1
μ
F
C
O
Region of Stable C
OUT
ESR vs. Load Current
100
Load Current (mA)
0 40 80 120 160 200
10
1
0.1
0.01
0.001
(
)
相關PDF資料 |
PDF描述 |
|---|---|
| RT9182BCE | DUAL, LOW-NOISE, 200mA LDO REGULATOR |
| RT9184 | 500 MA DUAL LDO REGULATOR |
| RT9184ACH | 500 MA DUAL LDO REGULATOR |
| RT9184BCH | 500 MA DUAL LDO REGULATOR |
| RT9222 | PROGRAMMABLE SYNCHRONOUS PWM BUCK CONVERTER WITH DUAL ADJUSTABLE LOW DROPOUT LINEAR REGULATOR CONROLLER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| RT9183-12GG | 功能描述:IC REG LDO 1.2V 1.5A SOT223 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 產(chǎn)品培訓模塊:MIC5365/66 Ultra-small LDO Regulators 標準包裝:1 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，固定式 輸出電壓:3V 輸入電壓:最高 5.5V 電壓 - 壓降（標準）:0.155V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?200mA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:4-UDFN 裸露焊盤，4-TMLF? 供應商設備封裝:4-TMLF?（1x1） 包裝:Digi-Reel® 其它名稱:576-3192-6 |
| RT9183-12GGF | 功能描述:IC REG LDO 1.2V 1.5A SOT223 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:50 系列:- 穩(wěn)壓器拓撲結(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（標準）:- 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 供應商設備封裝:TO-220-5 包裝:管件 配用:296-20624-ND - EVAL MOD FOR TPS72518 其它名稱:296-15154-5 |
| RT9183-12GL | 功能描述:IC REG LDO 1.2V 1.5A TO252 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 6V 電壓 - 壓降（標準）:0.08V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:帶卷 (TR) 其它名稱:LP3988IMFX-3.3 |
| RT9183-12GLF | 功能描述:IC REG LDO 1.2V 1.5A TO252 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:3,000 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，固定式 輸出電壓:3.3V 輸入電壓:最高 6V 電壓 - 壓降（標準）:0.08V @ 150mA 穩(wěn)壓器數(shù)量:1 電流 - 輸出:150mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SC-74A，SOT-753 供應商設備封裝:SOT-23-5 包裝:帶卷 (TR) 其它名稱:LP3988IMFX-3.3 |
| RT9183-12GM | 功能描述:IC REG LDO 1.2V 1.5A TO263 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 系列:- 標準包裝:1 系列:- 穩(wěn)壓器拓撲結(jié)構(gòu):正，可調(diào)式 輸出電壓:1.25 V ~ 10 V 輸入電壓:2.9 V ~ 12 V 電壓 - 壓降（標準）:- 穩(wěn)壓器數(shù)量:1 電流 - 輸出:700mA 電流 - 限制（最?。?- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-VFDFN 裸露焊盤 供應商設備封裝:10-DFN（3x3） 包裝:Digi-Reel® 其它名稱:NCV8535MNADJR2GOSDKR |
發(fā)布緊急采購，3分鐘左右您將得到回復。