参数资料
| 型号： | ISL65426HRZ |
| 厂商： | Intersil |
| 文件页数： | 15/22页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 6A DL 50QFN |
| 产品培训模块： | Dual Synchronous Integrated FET Buck Regulator Solutions for Industrial Control Applications |
| 标准包装： | 30 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 1 V ~ 4 V |
| 输入电压： | 3 V ~ 5.5 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 6A |
| 同步整流器： | 是 |
| 工作温度： | -10°C ~ 100°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 50-VFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 50-QFN（5x10） |
| 产品目录页面： | 1248 (CN2011-ZH PDF) |
ISL65426
EN
System enable for voltage monitoring with programmable
hysteresis. This pin has a POR rising threshold of 0.6V. This
enable is intended for applications where two or more input
power supplies are used and bias rise time is an issue.
The remaining four floating power blocks can be partitioned
in one of four valid states outlined in Table 1. The controller
detects the programmed configuration based on the state of
logic signals at pins ISET1 and ISET2. The controller checks
the power block configuration versus the programmed
configuration before the either converter can soft-start.
EN1, EN2
These pins are threshold-sensitive enable inputs for the
individual PWM converters. These pins have low current
(10μA) internal pull-ups to VCC. This pin disables the
respective converter until pulled above a 1V rising threshold.
ISET1, ISET2
Power block configuration inputs. Select the proper state for
Each power block has a separate power supply connection
pin, PVINx, and common channels must join these inputs to
one input power supply. Common synchronous power switch
connection points for each channel must be tied together
and to an external inductor. See the “Typical Application
Schematics” for pin connection guidance.
TABLE 1. POWER BLOCK CONFIGURATION
each pin according to Table 1.
V1SET1, V1SET2, V2SET1, V2SET2
CHANNEL 1
ISET1 ISET2 I OUT1 CONNECTIONS I OUT2
CHANNEL 2
CONNECTIONS
Output voltage configuration inputs. Select the proper state
of each pin per the “Electrical Specifications” table.
PG1, PG2
1
1
0
1
0
1
3A
4A
5A
LX1,LX2,LX3
LX1,LX2,LX3,LX4
LX1,LX2,LX3,
3A
2A
1A
LX4,LX5,LX6
LX5,LX6
LX5
Power-good output. Open drain logic output that is pulled to
LX4,LX6
ground when the output voltage is outside regulation limits.
0
0
2A
LX1,LX2
4A
LX3,LX4,LX5,LX6
Functional Description
Invalid LX Configurations: SS Prevented
The ISL65426 is a monolithic, constant frequency, current-
mode dual output buck converter controller with user
X
X
1A
LX2
5A
LX1,LX3,LX4,
LX5,LX6
configurable power blocks. Designed to provide a total
DC/DC solution for FPGAs, CPLDs, core processors, and
ASICs.
Each power block has a scaled pilot device providing current
feedback. The configuration pin settling determines how the
controller handles separation and summing of the individual
current feedback signals.
PVIN1
LX1
PVIN2
LX2
POWER BLOCK 1
POWER BLOCK 2
POWER BLOCK 6
POWER BLOCK 5
PVIN6
LX6
PVIN5
LX5
Main Control Loop
The ISL65426 is a monolithic, constant frequency,
current mode step-down DC/DC converter. During normal
operation, the internal top power switch is turned on at the
beginning of each clock cycle. Current in the output inductor
ramps up until the current comparator trips and turns off the
PVIN3
LX3
POWER BLOCK 3
POWER BLOCK 4
PVIN4
LX4
top power MOSFET. The bottom power MOSFET turns on
and the inductor current ramps down for the rest of the cycle.
The current comparator compares the output current at the
MASTER POWER BLOCK
FLOATING POWER BLOCK
FIGURE 35. POWER BLOCK DIAGRAM
Power Blocks
A unique power block architecture allows partitioning of six
1A capable modules to support one of four power block
configuration options. The block diagram in Figure 3
provides a top level view of the power block layout. One
master power block is assigned to each converter output
channel. Power Block 2 is allotted to converter Channel 1
and Power Block 5 to Channel 2. The master power blocks
must not be tied together or the controller will not soft-start.
15
ripple current peak to a current pilot. The error amplifier
monitors V OUT and compares it with the internal voltage
reference. The error amplifier ’s output voltage drives a
proportional current to the pilot. If V OUT is low the pilot’s
current level is increased and the trip off current level of the
output is increased. The increased current works to raise the
V OUT level into agreement with the voltage reference.
Output Voltage Programming
The feedback voltage applied to the inverting input of the
error amplifier is scaled internally relative to the 0.6V internal
reference voltage based on the state of logic signals at pins
V1SET1, V1SET2, V2SET1 and V2SET2. The output
voltage configuration logic decodes the 2-bit voltage
identification codes into one of the discrete voltages shown
FN6340.3
March 25, 2008
相关PDF资料 |
PDF描述 |
|---|---|
| ISL6545IBZ-T | IC REG CTRLR BUCK PWM VM 8-SOIC |
| ISL6548ACRZA-T | IC REG/CTLR ACPI DUAL DDR 28QFN |
| ISL6548CRZA | IC REG/CTRLR ACPI DUAL DDR 28QFN |
| ISL6551IR-T | IC REG CTRLR FLYBACK PWM 28-QFN |
| ISL6552CR-T | IC REG CTRLR BUCK PWM 20-QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ISL65426HRZS2698 | 制造商:Intersil Corporation 功能描述:LEAD-FREE W/ANNEAL, DUAL BUCK REGULATOR. -10 TO +100 TEMP. - Rail/Tube 制造商:Intersil 功能描述:W/ANNEAL DL BUCKG -10 TO +100 TEMP |
| ISL65426HRZS2715 | 制造商:Intersil Corporation 功能描述:S SPEC FOR TRACKING BROADCOM BUSINESS ONLY-SOLD THRU DISTI - Rail/Tube |
| ISL65426HRZ-T | 功能描述:IC REG BUCK SYNC ADJ 6A DL 50QFN 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 |
| ISL65426HRZ-TS2698 | 制造商:Intersil Corporation 功能描述:LEAD-FREE W/ANNEAL, DUAL BUCK REGULATOR. -10 TO +100 TEMP. - Tape and Reel 制造商:Intersil 功能描述:W/ANNEAL DL BUCKG -10 TO +100 TEMP |
| ISL65426HRZ-TS2715 | 制造商:Intersil Corporation 功能描述:S SPEC FOR TRACKING BROADCOM BUSINESS ONLY-SOLD THRU DISTI - Tape and Reel |
发布紧急采购，3分钟左右您将得到回复。