参数资料
型号: ISL6439AIRZ-T
厂商: Intersil
文件页数: 13/15页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 16-QFN
标准包装: 6,000
PWM 型: 电压模式
输出数: 1
频率 - 最大: 650kHz
占空比: 100%
电源电压: 3.3 V ~ 5 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 16-VQFN 裸露焊盘
包装: 带卷 (TR)
ISL6439, ISL6439A
recommended to minimize the voltage drop across the
bootstrap capacitor during the on-time of the upper
MOSFET. Initial calculations with V BOOT2 no less than 4V
will quickly help narrow the bootstrap capacitor range.
For example, consider an upper MOSFET is chosen with a
maximum gate charge, Q g , of 100nC. Limiting the voltage
drop across the bootstrap capacitor to 1V results in a value
of no less than 0.1 μ F. The tolerance of the ceramic capacitor
should also be considered when selecting the final bootstrap
capacitance value.
A fast recovery diode is recommended when selecting a
bootstrap diode to reduce the impact of reverse recovery
3.3V
charge loss. Otherwise, the recovery charge, Q RR , would
have to be added to the gate charge of the MOSFET and
taken into consideration when calculating the minimum
bootstrap capacitance.
ISL6439 DC/DC Converter Application
Circuit
Figure 8 shows an application circuit of a DC/DC Converter.
Detailed information on the circuit, including a complete
Bill-of-Materials and circuit board description, can be found
in the ISL6439 Application Note.
GND
TP 1
4
CT1
C 1
0.1 μ F
11
VCC
U 1
OCSET
6
C 2
1000pF
C 3
C 4
0.22 μ F
ISL6439
CPVOUT
3
TP 3
R 1
9.76k Ω
5
10
CT2
CPGND
BOOT
13
D 1
C 7
0.1 μ F
C 5
10 μ F
Ceramic
C 6
1 μ F
1
GND
UGATE
14
PHASE
12
L 1
2.5V @ 5A
ENABLE
9
ENABLE
LGATE
2
C 8,9
COMP
FB
Q 1
8
C 10
33pF
7
R 3
R 2
C 11
2.26k Ω
6.49k Ω 5600pF
R 4
C 12
R 5
1.07k Ω
124 Ω
8200pF
GND
FIGURE 8. 3.3V to 2.5V 5A DC/DC CONVERTER
Component Selection Notes:
C 3,8,9 - Each 150 μ F, Panasonic EEF-UE0J151R or Equivalent.
D1 - 30mA Schottky Diode, MA732 or Equivalent
L 1 - 1 μ H Inductor, Panasonic P/N ETQ-P6F1ROSFA or Equivalent.
Q 1 - Fairchild MOSFET; ITF86110DK8.
13
FN9057.5
November 5, 2008
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ISL6439CB 功能描述:电压模式 PWM 控制器 Sync Buck-Broadband RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel
ISL6439CB-T 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 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:40-VFQFN 裸露焊盘 包装:带卷 (TR)
ISL6439CBZ 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC 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)
ISL6439CBZ-T 功能描述:IC REG CTRLR BUCK PWM VM 14-SOIC 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)
ISL6439CR 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Intersil Corporation 功能描述: