- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄378130 > REG711EA-5 (Texas Instruments, Inc.) 50mA SWITCHED-CAP DC/DC CONVERTER PDF資料下載
參數(shù)資料
| 型號(hào)： | REG711EA-5 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 50mA SWITCHED-CAP DC/DC CONVERTER |
| 中文描述： | 50mA的開關(guān)第直流/直流轉(zhuǎn)換器 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 181K |
| 代理商： | REG711EA-5 |
REG711
SBVS027A
8
CAPACITOR SELECTION
For minimum output voltage ripple, the output capacitor
C
OUT
should be a ceramic, surface-mount type. Tantalum
capacitors generally have a higher Effective Series Resis-
tance (ESR) and may contribute to higher output voltage
ripple. Leaded capacitors also increase ripple due to the
higher inductance of the package itself. To achieve best
operation with low input voltage and high load current, the
input and pump capacitors (C
IN
, C
PUMP
respectively) should
also be surface-mount ceramic types. In all cases, X7R or
X5R dielectric are recommended. See the Typical Operating
Circuit shown in Figure 3 for component values.
The approximate efficiency is given by:
Efficiency (%) = V
OUT
/(2 V
IN
) 100 (step-up operating mode)
or
V
OUT
100/V
IN
(step-down operating mode)
Table II lists the approximate values of the input voltage at
which the device changes internal operating mode.
OPERATING MODE
CHANGES AT V
IN
OF
PRODUCT
REG711-2.5
REG711-2.7
REG711-3.0
REG711-3.3
REG711-5.0
> 3.2V
> 3.4V
> 3.7V
> 4.0V
Step-up only
TABLE II.
See efficiency curves in the Typical Performance Curves
section for various loads and input voltages.
LAYOUT
Large ripple currents flow in the V
IN
, PGND and V
OUT
traces. To minimize both input and output ripple, keep the
capacitors as close as possible to the regulator using short,
direct circuit traces.
A suggested PCB routing is shown in Figure 4. The trace
lengths from the input and output capacitors have been kept
as short as possible. A star ground system has been imple-
mented, with pin 5 as the center of the star. No ground plane
is provided in other layers, as this will provide capacitive
coupling for noise spikes.
FIGURE 4. Suggested PCB Design for Minimum Ripple.
With light loads or higher input voltage, a smaller 0.1
μ
F
pump capacitor (C
PUMP
) and smaller 1
μ
F input and output
capacitors (C
IN
and C
OUT
, respectively) can be used. To
minimize output voltage ripple, increase the output capaci-
tor, C
OUT
, to 10
μ
F or larger.
The capacitors listed in Table I have been used with the
REG711. This is only a representative list of those parts that
are compatible, and not the results of a complete survey of
an industry-wide offering.
EFFICIENCY
The efficiency of the charge pump regulator varies with the
output voltage version, the applied input voltage, the load
current, and the internal operation mode of the device.
FIGURE 3. Typical Operating Circuit.
C
0.22
μ
F
V
IN
V
OUT
C
IN
2.2
μ
F
PGND
ENABLE
GND
2
3
7
6
8
5
4
C
OUT
2.2
μ
F
REG711
NOTE: All Capacitors 1206 Size
RATED
WORKING
VOLTAGE
DIELECTRIC
MATERIAL
PACKAGE
SIZE
MANUFACTURER
PART NUMBER
VALUE
TOLERANCE
Kemet
C1206C255K8RAC
C1206C224K8RAC
ECJ3YB1A225K
ECJ3VB1C224K
LMK325BJ106KN
EMK316BJ225KL
TKM316BJ224KF
2.2
μ
F
0.22
μ
F
2.2
μ
F
0.22
μ
F
10
μ
F
2.2
μ
F
0.22
μ
F
±
10%
±
10%
±
10%
±
10%
±
10%
±
10%
±
10%
X7R
X7R
X7R
X7R
X5R
X7R
X7R
1206
1206
1206
1206
1210
1206
1206
10V
10V
10V
16V
10V
16V
25V
Panasonic
Taiyo Yuden
TABLE I. Capacitors That Have Been Successfully Used With The REG711.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| REG711 | 50mA SWITCHED-CAP DC/DC CONVERTER |
| RF-HDT-KMAB | 13.56 MHz Vicinity Key Fob Transponder |
| RFH30N15 | POWER MOS FIELD EFFECT TRANSISTORS |
| RFH30N12 | POWER MOS FIELD EFFECT TRANSISTORS |
| RFH45N05 | POWER MOS FIELD EFFECT TRANSISTORS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| REG711EA-5/250 | 功能描述:電荷泵 50mA Switched-Cap DC/DC Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| REG711EA-5/250G4 | 功能描述:電荷泵 50mA Switched-Cap DC/DC Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| REG711EA-5/2K5 | 功能描述:電荷泵 50mA Switched-Cap DC/DC Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| REG711EA-5/2K5G4 | 功能描述:電荷泵 50mA Switched-Cap DC/DC Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| REG711EVM-232 | 功能描述:電源管理IC開發(fā)工具 REG711-232 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。