- 您现在的位置：买卖IC网 > PDF目录80057 > LTC3589IUJ-1#PBF (LINEAR TECHNOLOGY CORP) SWITCHING REGULATOR, 2600 kHz SWITCHING FREQ-MAX, PQCC40 PDF资料下载
参数资料
| 型号： | LTC3589IUJ-1#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 2600 kHz SWITCHING FREQ-MAX, PQCC40 |
| 封装： | 6 X 6 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-40 |
| 文件页数： | 9/46页 |
| 文件大小： | 570K |
| 代理商： | LTC3589IUJ-1#PBF |
第1页第2页第3页第4页第5页第6页第7页第8页当前第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页
LTC3589/LTC3589-1
17
3589fc
The LTC3589/LTC3589-1 has exible options for enabling
and sequencing the regulator enables. The regulators are
enabled using input pins or the I2C serial port. To dene a
power-on sequence tie the enable of the rst regulator to be
powered up to the WAKE pin. Connect the rst regulators
output to the enable pin of the second regulator, and so on.
One or more regulators may be started in any sequence.
Each enable pin has a 200μs (typical) delay between the pin
and the internal enable of the regulator. When the system
controllers are satised that power rails are up, the con-
troller must drive PWR_ON HIGH to keep WAKE active. To
ensure correct start-up sequencing, the regulators outputs
are monitored by voltage comparators which require each
output to discharge below 300mV before re-enabling. A
software control command register function is available
which sets the regulators to effectively ignore their enable
pins but respond to I2C register enables. This function
enables software-only control of any combination of pin-
strapped regulators and is useful for implementing system
power saving modes. Keep-alive mode exempts selected
regulators from turning off during normal shutdown. In
keep-alive mode, the LTC3589/LTC3589-1 powers down
normally and is ready for the next start-up sequence, but
selected regulators are kept on to power memory or other
functions during system standby modes.
The LTC3589/LTC3589-1 will shut down all regulators
and pull down the WAKE pin under high temperature, VIN
undervoltage, and extended low regulator output voltage
conditions. Status of a hard shutdown is reported by the
IRQ status pin and the IRQSTAT status register.
The I2C serial port on the LTC3589/LTC3589-1 contains
13 command registers for controlling each of the regula-
tors, one read-only register for monitoring each regulators
power good status, one read-only register for reading
the cause of an IRQ event, and one clear IRQ command
register. The LTC3589/LTC3589-1 I2C supports random
addressing of any register.
LTC3589 TO LTC3589-1 FUNCTIONAL COMPARISON
Table 1. summarizes the functional differences between
the LTC3589 and the LTC3589-1.
Table 1. LTC3589 and LTC3589-1 Functional Differences
LTC3589
LTC3589-1
Power-On Inhibit Enable
Delay
1 second
<2ms
Buck2 Current Output
1A
1.2A
Buck3 Current Output
1A
1.2A
PGOOD Fault Timeout
Enabled by Default.
I2C Disable.
Disabled by default.
I2C Enable.
PWR_ON to WAKE Delay
50ms
2ms
LDO3 VOUT
1.8V
2.8V
LDO4 VOUT
* Indicates Default VOUT
1.8V, 2.5V, 2.8V*,
3.3V
1.2V*, 1.8V, 2.5V,
3.2V
Default LDO4 Enable
LDO34_EN Pin
I2C
Details of the operation of the LTC3589 and LTC3589-1
are found in the following sections.
ALWAYS-ON LDO
The LTC3589/LTC3589-1 includes a low quiescent current
low dropout regulator that remains powered whenever a
valid supply is present on VIN. The always-on LDO will
remain active until VIN drops below 2.0V (typical). This
is below the 2.5V undervoltage threshold in effect for the
rest of the LTC3589/LTC3589-1 circuits. The always-on
LDO is used to provide power to a standby microcon-
troller, real-time clock, or other keep-alive circuits. The
LDO is guaranteed to support a 25mA load. A 1μF low
impedance ceramic bypass capacitor from LDO1_STBY
to GND is required for compensation. A power good
monitor pulls RSTO LOW for a minimum of 14ms (typical)
whenever LDO1_STBY is 8% below its regulation target.
An LDO1_STBY undervoltage condition is reported in the
PGOOD status register. The output voltage of LDO1 is set
with a resistor divider connected from LDO1_STBY to the
feedback pin LDO1_FB, as shown in Figure 1.
VLDO_STBY =0.8 1+
R1
R2
(V)
Typical values for R1 are in the range of 40k to 1M.
OPERATION
相关PDF资料 |
PDF描述 |
|---|---|
| LES015YJ38N | 1-OUTPUT 15 W DC-DC REG PWR SUPPLY MODULE |
| LES015ZH38N | 1-OUTPUT 15 W DC-DC REG PWR SUPPLY MODULE |
| LM2320-7ERV2F | 2-OUTPUT 50 W AC-DC REG PWR SUPPLY MODULE |
| LM2320-9ERD3A | 2-OUTPUT 50 W AC-DC REG PWR SUPPLY MODULE |
| LM2540-7ERD0AH | 2-OUTPUT 50 W AC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3589IUJ-2#PBF | 功能描述:IC POWER MANAGEMENT RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:* 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LTC3589IUJ-2#TRPBF | 功能描述:IC POWER MANAGEMENT RoHS:是 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:* 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LTC3589IUJ-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:8-Output Regulator with Sequencing and I2C |
| LTC3589IUJ-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:8-Output Regulator with Sequencing and I2C |
| LTC3600EDD#PBF | 功能描述:IC REG BUCK SYNC ADJ 1.5A 12DFN 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:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
发布紧急采购，3分钟左右您将得到回复。