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參數(shù)資料
| 型號(hào)： | ISL6420A |
| 廠商： | Intersil Corporation |
| 英文描述： | Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller(單片同步降壓脈寬調(diào)制控制器) |
| 中文描述： | 高級(jí)單同步降壓脈寬調(diào)制（PWM）控制器（單片同步降壓脈寬調(diào)制控制器） |
| 文件頁數(shù)： | 10/20頁 |
| 文件大小： | 560K |
| 代理商： | ISL6420A |
10
FN9169.1
October 13, 2005
Pin Descriptions
VIN -
This pin powers the controller and must be decoupled
to ground using a ceramic capacitor as close as possible to
the VIN pin.
SGND -
This pin provides the signal ground for the IC. Tie
this pin to the ground plane through the lowest impedance
connection.
LGATE -
This pin provides the PWM-controlled gate drive for
the lower MOSFET.
PHASE -
This pin is the junction point of the output filter
inductor, the upper MOSFET source and the lower MOSFET
drain. This pin is used to monitor the voltage drop across the
upper MOSFET for overcurrent protection. This pin also
provides a return path for the upper gate drive.
UGATE -
This pin provides the PWM-controlled gate drive
for the upper MOSFET.
BOOT -
This pin powers the upper MOSFET driver. Connect
this pin to the junction of the bootstrap capacitor and the
cathode of the bootstrap diode. The anode of the bootstrap
diode is connected to the VCC5 pin.
FB -
This pin is connected to the feedback resistor divider
and provides the voltage feedback signal for the controller.
This pin sets the output voltage of the converter.
COMP -
This pin is the error amplifier output pin. It is used as
the compensation point for the PWM error amplifier.
PGOOD -
This pin provides a power good status. It is an
open collector output used to indicate the status of the
output voltage.
RT -
This is the oscillator frequency selection pin.
Connecting this pin directly to VCC5 will select the oscillator
free running frequency of 300kHz. By placing a resistor from
this pin to GND, the oscillator frequency can be programmed
from 100kHz to 1.4MHz. Figure 8 shows the oscillator
frequency vs the RT resistance.
CDEL -
The PGOOD signal can be delayed by a time
proportional to a CDEL current of 2μA & the value of the
capacitor connected between this pin and ground. A 0.1μF
will typically provide 125ms delay. When in the Voltage
margining mode the CDEL current is 100μA typical and
provides the delay for the output voltage slew rate, 2.5ms
typical for the 0.1μF capacitor.
PGND
- This pin provides the power ground for the IC. Tie
this pin to the ground plane through the lowest impedance
connection.
PVCC
- This pin is the power connection for the gate drivers.
Connect this pin to the VCC5 pin.
VCC5
– This pin is the output of the internal 5V LDO.
Connect a minimum of 4.7μF ceramic decoupling capacitor
as close to the IC as possible at this pin. Refer to Table 1.
ENSS
- This pin provides enable/disable function and soft-
start for the PWM output. The output drivers are turned off
when this pin is held below 1V.
OCSET
- Connect a resistor (ROCSET) from this pin to the
drain of the upper MOSFET. ROCSET, an internal 100μA
current source (IOCS), and the upper MOSFET on
resistance r
DS(ON)
set the converter overcurrent (OC) trip
point according to the following equation:
An overcurrent trip cycles the soft-start function with an ON
time of 20ms and an OFF time of 128ms.
GPIO1/REFIN -
This is a dual function pin. If VMSET/MODE
is not connected to VCC5 then this pin serves as GPIO1.
Refer to Table 2 for GPIO commands interpretation.
If VMSET/MODE is connected to VCC5 then this pin will
serve as REFIN. As REFIN, this pin is the non-inverting input
to the error amplifier. Connect the desired reference voltage
to this pin in the range of 0.6V to 1.25V.
Connect this pin to VCC5 to use internal reference.
REFOUT
- If VMSET/MODE pin is connected to VCC5, then
this pin serves as
REFOUT. It provides buffered reference
output for REFIN. Connect 2.2μF capacitor to this pin when
used as REFOUT. If not used to source current, connect a
1μF bypass capacitor to this pin.
TABLE 1. INPUT SUPPLY CONFIGURATION
INPUT
PIN CONFIGURATION
5.6V to 28V
Connect the input to the VIN pin. The VCC5
pin will provide a 5V output from the internal
LDO. Connect PVCC to VCC5.
5V ±10%
Connect the input to the VCC5 pin. Connect
the PVCC and VIN pins to VCC5.
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
0
25
50
75
100
125
150
RT (k
)
F
FIGURE 8. OSCILLATOR FREQUENCY vs RT
I
OC
I
------------------------------------------------------
R
DS ON
)
=
(EQ. 1)
ISL6420A
相關(guān)PDF資料 |
PDF描述 |
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| ISL6420AIAZ-TK | Circular Connector; No. of Contacts:22; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:12-35 RoHS Compliant: No |
| ISL6420IAZ-TK | PCB Relay; Contacts:SPDT; Contact Carry Current:500mA; Coil Voltage DC Max:9V; Relay Terminals:SMT Gullwing; Coil Resistance:405ohm; Contact Rating:10mA at 30VAC; Leaded Process Compatible:Yes; Peak Reflow Compatible (260 C):No RoHS Compliant: Yes |
| ISL6420IRZ-T | Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller |
| ISL6420IA-TK | Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller |
| ISL6420IAZ | Advanced Single Synchronous Buck Pulse-Width Modulation (PWM) Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| ISL6420AEVAL1Z | 功能描述:EVALUATION BOARD FOR ISL6240A RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6420AEVAL3Z | 功能描述:EVALUATION BOARD FOR ISL6240A RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6420AIAZ | 功能描述:IC REG CTRLR BUCK PWM VM 20-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:75 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.3 V ~ 13.5 V 降壓:是 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:0°C ~ 70°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:管件 產(chǎn)品目錄頁面:1051 (CN2011-ZH PDF) 其它名稱:296-2543-5 |
| ISL6420AIAZS2698 | 制造商:Intersil Corporation 功能描述:PB-FREE SYNC BUCK PWM CONT. W/ 4.5V-28V INPUT,20LD QSOP - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| ISL6420AIAZ-TK | 功能描述:IC REG CTRLR BUCK PWM VM 20-QSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:275kHz 占空比:50% 電源電壓:18 V ~ 110 V 降壓:無 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:是 工作溫度:-40°C ~ 85°C 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) |
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