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參數(shù)資料
| 型號： | EL7516IY |
| 廠商： | International Rectifier |
| 英文描述： | 600kHz/1.2MHz PWM Step-Up Regulator |
| 中文描述： | 600kHz/1.2MHz PWM升壓調(diào)節(jié)器 |
| 文件頁數(shù)： | 2/11頁 |
| 文件大?。?/td> | 303K |
| 代理商： | EL7516IY |
10
FN7333.3
For noise sensitive application, a 0.1F placed in parallel
with the larger output capacitor is recommended to reduce
the switching noise coupled from the LX switching node.
Schottky Diode
In selecting the Schottky diode, the reverse break down
voltage, forward current and forward voltage drop must be
considered for optimum converter performance. The diode
must be rated to handle 1.5A, the current limit of the
EL7516. The breakdown voltage must exceed the maximum
output voltage. Low forward voltage drop, low leakage
current, and fast reverse recovery will help the converter to
achieve the maximum efficiency.
Input Capacitor
The value of the input capacitor depends the input and
output voltages, the maximum output current, the inductor
value and the noise allowed to put back on the input line. For
most applications, a minimum 10F is required. For
applications that run close to the maximum output current
limit, input capacitor in the range of 22F to 47F is
recommended.
The EL7516 is powered from the VIN. To. High frequency
0.1F by-pass cap is recommended to be close to the VIN
pin to reduce supply line noise and ensure stable operation.
Loop Compensation
The EL7516 incorporates an transconductance amplifier in
its feedback path to allow the user some adjustment on the
transient response and better regulation. The EL7516 uses
current mode control architecture which has a fast current
sense loop and a slow voltage feedback loop. The fast
current feedback loop does not require any compensation.
The slow voltage loop must be compensated for stable
operation. The compensation network is a series RC
network from COMP pin to ground. The resistor sets the high
frequency integrator gain for fast transient response and the
capacitor sets the integrator zero to ensure loop stability. For
most applications, the compensation resistor in the range of
2K to 7.5K and the compensation capacitor in the range of
3nF to 10nF.
Soft-Start
The soft-start is provided by an internal 6A current source
charges the external CSS, the peak MOSFET current is
limited by the voltage on the capacitor. This in turn controls
the rising rate of the output voltage. The regulator goes
through the start-up sequence as well after the SHDN pin is
pulled to HI.
Frequency Selection
The EL7516 switching frequency can be user selected to
operate at either at constant 620kHz or 1.25MHz.
Connecting FSEL pin to ground sets the PWM switching
frequency to 620kHz. When connect FSEL high or VDD,
switching frequency is set to 1.25MHz.
Shut-Down Control
When shut-down in is pulled low, the EL7516 is shut-down
reducing the supply current to <3A.
Maximum Output Current
The MOSFET current limit is nominally 1.5A and guaranteed
1.3A. This restricts the maximum output current IOMAX
based on the following formula:
where:
IL = MOSFET current limit
IL-AVG = average inductor current
IL = inductor ripple current
VDIODE = Schottky diode forward voltage, typically, 0.6V
FS = switching frequency, 600KHz or 1.2MHz
D = MOSFET turn-on ratio:
The following table gives typical maximum Iout values for
1.2MHz switching frequency and 22H inductor:
Thermal Performance
The EL7516 uses a fused-lead package, which has a
reduced
θJA of 100°C/W on a four-layer board and 115°C/W
on a two-layer board. Maximizing copper around the ground
pins will improve the thermal performance.
This device also has internal thermal shut-down set at
around 130°C to protect the component.
TABLE 1.
VIN (V)
VOUT (V)
IOMAX (mA)
2.5
5
570
2.5
9
325
2.5
12
250
3.3
5
750
3.3
9
435
3.3
12
330
5
9
650
5
12
490
IL
IL-AVG 12
I
L
×
()
+
=
I
L
VIN
VO VDIODE
+
() V
IN
–
[]
×
LVO
(
VDIODE) FS
×
+
×
------------------------------------------------------------------------------
=
IL-AVG
IOUT
1D
–
-------------
=
D1
VIN
VOUT VDIODE
+
--------------------------------------------
–
=
EL7516
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| EL7516IYS2695 | 制造商:Intersil Corporation 功能描述: |
| EL7516IY-T13 | 功能描述:IC REG BOOST 0.6A 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應商設備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| EL7516IY-T7 | 功能描述:IC REG BOOST 0.6A 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3.3V 輸入電壓:4.5 V ~ 24 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:125mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 包裝:Digi-Reel® 供應商設備封裝:SOT-6 其它名稱:MAX1836EUT33#TG16DKR |
| EL7516IYZ | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 EL7516IYZ 600KHZ/1 2 MHZ PWM STP-UPG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| EL7516IYZS2695 | 制造商:Intersil Corporation 功能描述:EL7516IYZ - FOR TRACKING PURPOSES ONLY, USES PL CODE D3W - Rail/Tube |
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