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参数资料
| 型号： | ISL8120EVAL3Z |
| 厂商： | Intersil |
| 文件页数： | 18/35页 |
| 文件大小： | 0K |
| 描述： | EVALUATION BOARD FOR ISL8120 |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 2，非隔离 |
| 输出电压： | 1.2V，1.2V |
| 电流 - 输出： | 2 x 25A 或 1 x 50A |
| 输入电压： | 3 ~ 22 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 150kHz ~ 1.5MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | ISL8120 |
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ISL8120
Functional Pin Descriptions
GND (Pin 33)
The bottom pad is the signal and power ground plane. All
voltage levels are referenced to this pad. This pad provides a
return path for the low-side MOSFET drives and internal
power circuitries as well as all analog signals. Connect this
pad to the circuit ground with the shortest possible path
(more than 5 to 6 vias to the internal ground plane, placed on
the soldering pad are recommended).
VIN (Pin 16)
This pin is the input of the internal linear regulator. It should
be tied directly to the input rail. When used with an external
5V supply, this pin should be tied directly to PVCC. The
internal linear device is protected against reverse bias
generated by the remaining charge of the decoupling
capacitor at PVCC when losing the input rail.
VCC (Pin 26)
This pin provides bias power for the analog circuitry. An RC
filter is recommended between the connection of this pin to a
3V to 5.6V bias (typically PVCC). R is suggested to be a 5 Ω
resistor. And in 3.3V applications, the R could be shorted to
allow the low end input in concerns of the VCC falling
threshold. The VCC decoupling capacitor C is strongly
recommended to be as large as a 10μF ceramic capacitor.
This pin can be powered either by the internal linear
regulator or by an external voltage source.
BOOT1, 2 (Pins 25, 17)
This pin provides the bootstrap bias for the high-side driver.
Internal bootstrap diodes connected to the PVCC pin provide
the necessary bootstrap charge. Its typical operational
voltage range is 2.5V to 5.6V.
UGATE1, UGATE2 (Pin 24, 18)
These pins provide the drive for the high-side devices and
should be connected to the MOSFETs’ gates.
PHASE1, PHASE2 (Pins 23,19)
Connect these pins to the source of the high-side MOSFETs
and the drain of the low-side MOSFETs. These pins
represent the return path for the high-side gate drives.
PVCC (Pin 21)
This pin is the output of the internal series linear regulator. It
provides the bias for both low-side and high-side drives. Its
operational voltage range is 3V to 5.6V. The decoupling
ceramic capacitor in the PVCC pin is 10μF.
LGATE1, LGATE2 (Pins 22, 20)
These pins provide the drive for the low-side devices and
should be connected to the MOSFETs’ gates.
FSYNC (Pin 5)
The oscillator switching frequency is adjusted by placing a
resistor (R FS ) from this pin to GND. The internal oscillator
18
will lock to an external frequency source if this pin is
connected to a switching square pulse waveform, typically
the CLKOUT input signal from another ISL8120 or an
external clock. The internal oscillator synchronizes with the
leading edge of the input signal.
EN/FF1, EN/FF2 (Pins 4, 6)
T hese pins have triple functions. The voltage on EN/FF_ pin
is compared with a precision 0.8V threshold for system
enable to initiate soft-start. With a voltage lower than the
threshold, the corresponding channel can be disabled
independently. By connecting these pins to the input rail
through a voltage resistor divider, the input voltage can be
monitored for UVLO (undervoltage lockout ) function. The
undervoltage lockout and its hysteresis levels can be
programmed by these resistor dividers. The voltages on
these pins are also fed into the controller to adjust the
sawtooth amplitude of each channel independently to realize
the feed-forward function.
Furthermore, during fault (such as overvoltage, overcurrent,
and over-temperature) conditions, these pins (EN/FF_) are
pulled low to communicate the information to other cascaded
ICs.
PGOOD (Pin 8)
Provides an open drain Power-Good signal when both
channels are within 9% of the nominal output regulation
point with 4% hysteresis (13%/9%) and soft-start complete.
PGOOD monitors the outputs (VMON1/2) of the internal
differential amplifiers.
ISEN1A, ISEN2A (Pins 27, 15)
These pins are the non-inverting (+) inputs of the current
sensing amplifiers to provide r DS(ON) , DCR, or precision
resistor current sensing together with the ISEN1B, ISEN2B
pins.
ISEN1B, ISEN2B (Pins 28, 14)
These pins are the inverting (-) inputs of the current sensing
amplifiers to provide rDS(ON), DCR, or precision resistor
current sensing together with the ISEN1A, ISEN2A pins.
set up.
ISET (Pin 2)
This pin sources a 15μA offset current plus the average current
of both channels in multiphase mode or only Channel 1’s
current in independent mode. The voltage (V ISET ) set by an
external resistor (R ISET ) represents the average current level of
the local active channel(s).
ISHARE (Pin 3)
This pin is used for current sharing purposes and is
configured to current share bus representing all modules’
March 20, 2009
FN6641.0
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| ISL8120EVAL4Z | 功能描述:BOARD EVALUATION FOR ISL8120 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 |
| ISL8120IRZ | 功能描述:IC REG CTRLR BUCK PWM VM 32-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) |
| ISL8120IRZEC | 功能描述:IC REG CTRLR BUCK PWM VM 32-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) |
| ISL8120IRZ-T | 功能描述:IC REG CTRLR BUCK PWM VM 32-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) |
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