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参数资料
| 型号： | ISL85402IRZ-T |
| 厂商： | Intersil |
| 文件页数： | 3/22页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BOOST SYNC ADJ 20QFN |
| 标准包装： | 6,000 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 可调至 0.8V |
| 输入电压： | 3 V ~ 36 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz ~ 2.2MHz |
| 电流 - 输出： | 2.5A |
| 同步整流器： | 两者兼有 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-VFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 20-QFN（4x4） |
ISL85402
Functional Pin Descriptions
(Continued)
PIN NAME
SYNC
LGATE
PGND
BOOT
VIN
SGND
VCC
AUXVCC
PAD
PIN #
12
13
14
15
16, 17
18
19
20
21
DESCRIPTION
This pin can be used to synchronize two or more ISL85402 controllers. Multiple ISL85402s can be synchronized with their
SYNC pins connected together. 180 degree phase shift is automatically generated between the master and slave ICs.
The internal oscillator can also lock to an external frequency source applied on this pin with square pulse waveform (with
frequency 10% higher than the IC’s local frequency, and pulse width higher than 150ns). Range: 0V to 5.5V.
This pin should be left floating if not used.
In synchronous buck mode, this pin is used to drive the lower side MOSFET to improve efficiency.
In non-synchronous buck when a diode is used as the bottom side power device, this pin should be connected to VCC before
VCC startup to have low-side driver (LGATE) disabled.
In boost mode, it can be used to drive the boost power MOSFET. The boost control PWM is same with the buck control PWM.
This pin is used as the ground connection of the power flow including driver. Connect it to large ground plane.
This pin provides bias voltage to the high-side MOSFET driver. A bootstrap circuit is used to create a voltage suitable to drive
the internal N-channel MOSFET. The boot charge circuitries are integrated inside of the IC. No external boot diode is needed.
A 1μF ceramic capacitor is recommended to be used between BOOT and PHASE pin.
Connect the input rail to these pins that are connected to the drain of the integrated high-side MOSFET as well as the source
for the internal linear regulator that provides the bias of the IC. Range: 3V to 36V.
With the part switching, the operating input voltage applied to the VIN pins must be under 36V. This recommendation allows
for short voltage ringing spikes (within a couple of ns time range) due to switching while not exceeding “Absolute Maximum
This pin provides the return path for the control and monitor portions of the IC. Connect it to a quiet ground plane.
This pin is the output of the internal linear regulator that supplies the bias for the IC including the driver. A minimum 4.7μF
decoupling ceramic capacitor is recommended between VCC to ground.
This pin is the input of the auxiliary internal linear regulator, which can be supplied by the regulator output after power-up.
With such configuration, the power dissipation inside of the IC is reduced. The input range for this LDO is 3V to 20V.
In boost mode operation, this pin works as boost output overvoltage detection pin. It detects the boost output through a
resistor divider. When voltage on this pin is above 0.8V, the boost PWM is disabled; and when voltage on this pin is below 0.8V
minus the hysteresis, the boost PWM is enabled.
Range: 0V to 20V.
Bottom thermal pad. It is not connected to any electrical potential of the IC. In layout it must be connected to PCB ground
copper plane with area as large as possible to effectively reduce the thermal impedance.
Ordering Information
PART NUMBER
PART
TEMP.
PACKAGE
(Notes 1, 2, 3)
ISL85402IRZ
MARKING
85 402IRZ
RANGE (°C)
-40 to +105
(PB-Free)
20 Ld 4x4 QFN
PKG. DWG. #
L20.4x4C
ISL85402EVAL1Z
Evaluation Board
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL85402 . For more information on MSL please see techbrief TB363 .
3
FN7640.1
April 25, 2013
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL85402IRZ-T7A | 功能描述:直流/直流开关调节器 SWITCHING REG 4X4 QFN RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| ISL85402IRZ-TK | 功能描述:IC REG BUCK BOOST SYNC ADJ 20QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:1 输出电压:5V，1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:16-QSOP |
| ISL8540EVAL1Z | 功能描述:EVALUATION BOARD FOR ISL8540 RoHS:是 类别:编程器，开发系统 >> 评估板 - DC/DC 与 AC/DC（离线）SMPS 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:True Shutdown™ 主要目的:DC/DC，步升 输出及类型:1，非隔离 功率 - 输出:- 输出电压:- 电流 - 输出:1A 输入电压:2.5 V ~ 5.5 V 稳压器拓扑结构:升压 频率 - 开关:3MHz 板类型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL8540IVEZ | 功能描述:IC REG BUCK SYNC ADJ 2A 20HTSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:1 系列:EZBuck™ 类型:降压（降压） 输出类型:可调式 输出数:1 输出电压:0.8 V ~ 22.1 V 输入电压:3 V ~ 26 V PWM 型:电流模式 频率 - 开关:1.5MHz 电流 - 输出:1.8A 同步整流器:无 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-WFDFN 裸露焊盘 包装:剪切带 (CT) 供应商设备封装:8-DFN（2x2） 其它名称:785-1276-1 |
| ISL8540IVEZ-T | 功能描述:IC REG BUCK SYNC ADJ 2A 20HTSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:1 输出电压:5V，1 V ~ 10 V 输入电压:3.5 V ~ 28 V PWM 型:电流模式 频率 - 开关:220kHz ~ 1MHz 电流 - 输出:600mA 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:16-SSOP（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:16-QSOP |
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