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參數(shù)資料
| 型號(hào)： | EN5366QI |
| 廠商： | ENPIRION INC |
| 元件分類： | 穩(wěn)壓器 |
| 中文描述： | SWITCHING REGULATOR, 5000 kHz SWITCHING FREQ-MAX, QCC58 |
| 封裝： | HALOGEN FREE AND ROHS COMPLIANT, QFN-58 |
| 文件頁數(shù)： | 16/16頁 |
| 文件大?。?/td> | 835K |
| 代理商： | EN5366QI |
03817
9/18/2009
Rev:B
EN5366QI
Theory of Operation
Synchronous Buck Converter
The EN5366 is a synchronous, programmable
power supply with integrated power MOSFET
switches and integrated inductor. The nominal
input voltage range is 2.4-5.5V. The output
voltage is programmed using an external resistor
divider network. The feedback control loop is a
type III voltage-mode and the part uses a low-
noise PWM topology. Up to 6A of continuous
output current can be drawn from this converter.
The 5MHz operating frequency enables the use
of small-size input and output capacitors.
The power supply has the following protection
features:
Programmable over-current protection (to
protect the IC from excessive load
current).
Short Circuit protection.
Thermal shutdown with hysteresis.
Programmable over-voltage protection.
Under-voltage lockout circuit to disable the
converter output when the input voltage is
less than approximately 2.2V
Additional features include:
Soft-start circuit, to limit the in-rush current
when the converter is powered up.
Power good circuit (POK) indicating
whether the output voltage is between
90% of nominal VOUT and the OVP trip
point.
Output Voltage Programming
The EN5366 output voltage is programmed using
a simple resistor divider network. Figure 4 shows
the resistor divider configuration.
The EN5366 output voltage and over voltage
thresholds are determined by the voltages
presented at the XFB and XOV pins respectively.
These voltages are set by way of resistor dividers
between VOUT and AGND with the midpoint going
to XFB and XOV.
It is recommended that Rb1 and Rb2 resistor
values be ~2k
. Use the following equation to
set the resistor Ra1 for the desired output
voltage:
V
Rb
V
Vout
Ra
75
.
0
1
*
)
75
.
0
(
1
=
If over-voltage protection is desired, use the
following equation to set the resistor Ra2 for the
desired OVP trip-point:
V
Rb
V
OVPtrip
Ra
90
.
0
2
*
)
90
.
0
(
2
=
By design, if both resistor dividers are the same,
the OV trip-point will be 20% above the nominal
output voltage.
XFB
C
SS
VOUT
POK
PGND
AGND
SS
PVIN
AVIN
XOV
V
OUT
V
IN
47
F
47
F
R
a1
R
a2
R
b1
R
b2
Figure 4.
VOUT and OVP resistor divider networks.
Input Capacitor Selection
The EN5366QI requires about 40-50uF of input
capacitance. Low ESR ceramic capacitors are
required with X5R or X7R dielectric formulation.
Y5V or equivalent dielectric formulations must
not be used as they lose capacitance with
frequency, temperature and bias voltage.
In some applications, lower value ceramic
capacitors maybe needed in parallel with the
larger capacitors in order to provide high
frequency decoupling.
Enpirion 2009 all rights reserved, E&OE
www.enpirion.com
9
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EN5366QI-E | 功能描述:電源管理IC開發(fā)工具 6AMP MOD INT IND EVAL BOARD 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 |
| EN5367QI | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 6A DC/DC BUCK CONV. W/ INTEGRATED INDUC. RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| EN5367QI-E | 功能描述:電源管理IC開發(fā)工具 EN5367QI EVAL 6A DC/DC BUCK 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 |
| EN539 | 制造商:Energizer Battery Company 功能描述:ALKALINE ZN/MNO2 BATTERY, 6V, J; Battery Size Code:J; Battery Capacity:625mAh; Battery Voltage:6V; Battery Technology:Alkaline Zinc Manganese Dioxide; Battery Terminals:Pressure Contact; External Height:48.5mm; External Width:35.6mm ;RoHS Compliant: NA |
| EN5394QI | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 9A Volt Mde Syn Buck PWM DC-DC Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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