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参数资料
| 型号： | ISL6420IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 10/19页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 20-QFN |
| 标准包装： | 6,000 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1.4MHz |
| 占空比： | 100% |
| 电源电压： | 4.5 V ~ 16 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
ISL6420
Pin Descriptions
VIN
This pin powers the controller and must be closely
decoupled to ground using a ceramic capacitor as close to
the VIN pin as possible.
TABLE 1. INPUT SUPPLY CONFIGURATION
frequency of 300kHz. By placing a resistor from this pin to
GND, the oscillator frequency can be programmed from
100kHz to 1.4MHz. Figure 7 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 and the value of the capacitor
INPUT
5.6V to 16V
5V +±10%
PIN CONFIGURATION
Connect the input to the VIN pin. The VCC5
pin will provide a 5V output from the internal
LDO. Connect PVCC to VCC5.
Connect the input to the VCC5 pin. Connect
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.
the PVCC and VIN pins to VCC5.
1400
SGND
This pin provides the signal and power 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
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
This pin is the junction point of the output filter inductor, the
0
0
25
50
75
100
125
150
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
10
RT (k Ω )
FIGURE 7. OSCILLATOR FREQUENCY vs. RT
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 (R OCSET ) and a capacitor from this pin to
the drain of the upper MOSFET. R OCSET , an internal 100μA
current source (I OCSET ), and the upper MOSFET on
resistance r DS(ON) set the converter overcurrent (OC) trip
point.
FN9151.5
February 13, 2008
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相关代理商/技术参数 |
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| ISL6420IRZ-TK | 功能描述:IC REG CTRLR BUCK PWM VM 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:275kHz 占空比:50% 电源电压:18 V ~ 110 V 降压:无 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:-40°C ~ 85°C 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) |
| ISL6420IRZ-TKR5207 | 制造商:Intersil Corporation 功能描述: |
| ISL6420IRZ-TKS2698 | 制造商:Intersil Corporation 功能描述:PB-FREE SYNCH BUCK PWM CONT. WITH 4.5V-16V INPUT,20LD 4X4 QF - Tape and Reel |
| ISL6421AER | 功能描述:IC REG SGL LNB CONTROL 32-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| ISL6421AER-T | 功能描述:IC REG SGL LNB CONTROL 32-QFN RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
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