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參數資料
| 型號： | ISL6455A |
| 廠商： | Intersil Corporation |
| 英文描述： | Triple Output Regulator with Single Synchronous Buck and Dual LDO(帶單同步降壓和雙LDO的三路輸出調節器) |
| 中文描述： | 三單和雙同步降壓穩壓器LDO輸出（帶單同步降壓和雙穩壓器的三路輸出調節器） |
| 文件頁數： | 1/12頁 |
| 文件大小： | 320K |
| 代理商： | ISL6455A |
1
FN9196.0
ISL6455, ISL6455A
Triple Output Regulator with Single
Synchronous Buck and Dual LDO
The ISL6455 is a highly integrated triple output regulator
which provides a single chip solution for FPGAs and wireless
chipset power management. The device integrates a high
efficiency synchronous buck regulator (adjustable) with two
ultra low noise LDO regulators (adjustable). Either the
ISL6455 or ISL6455A can be selected based on whether
3.3V ±10% or 5V ±10% is required as an input voltage.
The synchronous current mode control PWM regulator with
integrated N- and P-channel power MOSFET provides
adjustable voltages based on external resistor setting.
Synchronous rectification with internal MOSFETs is used to
achieve higher efficiency and reduced number of external
components. Operating frequency is typically 750kHz
allowing the use of smaller inductor and capacitor values.
The device can be synchronized to an external clock signal
in the range of 500kHz to 1MHz. The PG_PWM output
indicates loss of regulation on PWM output.
The ISL6455 also has two LDO adjustable regulators using
internal PMOS transistors as pass devices. LDO2 features
ultra low noise typically below 30μV
RMS
to aid VCO stability.
The EN_LDO pin controls LDO1 and LDO2 outputs. The
ISL6455 also integrates a RESET function, which eliminates
the need for additional RESET IC required in WLAN and
other applications. The IC asserts a RESET signal whenever
the V
IN
supply voltage drops below a preset threshold,
keeping it asserted for at least 25ms after V
IN
has risen
above the reset threshold. The PG_LDO output indicates
loss of regulation on either of the two LDO outputs. Other
features include overcurrent protection and thermal
shutdown for all the three outputs.
High integration and the thin Quad Flat No-lead (QFN)
package makes ISL6455 an ideal choice for powering
FPGAs and small form factor wireless cards such as
PCMCIA, mini-PCI and Cardbus-32.
Features
Fully integrated synchronous buck regulator + dual LDO
PWM output voltage adjustable.
- 0.8V to 2.5V with ISL6455 (VIN = 3.3V)
- 0.8V to 3.3V with ISL6455A (VIN = 5.0V)
High output current. . . . . . . . . . . . . . . . . . . . . . . . . 600mA
Dual LDO adjustable options
- LDO1, 1.2V to Vin-0.3V (3.3Vmax). . . . . . . . . . . 300mA
- LDO2, 1.2V to Vin-0.3V (3.3Vmax). . . . . . . . . . . 300mA
Ultra-compact DC/DC converter design
Stable with small ceramic output capacitors and no load
High conversion efficiency
Low shutdown supply current
Low dropout voltage for LDOs
- LDO1 . . . . . . . . . . . . . . . . . . 150mV (typical) at 300mA
- LDO2 . . . . . . . . . . . . . . . . . . 150mV (typical) at 300mA
Low output voltage noise
- <30μV
RMS
(typical) for LDO2 (VCO supply)
PG_LDO and PG_PWM (PWM and LDO) outputs
Extensive circuit protection and monitoring features
- PWM overvoltage protection
- Overcurrent protection
- Shutdown
- Thermal shutdown
Integrated RESET output for microprocessor reset
Proven reference design for total WLAN system solution
QFN package
- Compliant to JEDEC PUB95 MO-220 QFN - Quad Flat
No Leads - Product Outline
- Near Chip-Scale package footprint Improves PCB
efficiency and is thinner in Profile
Pb-free plus anneal available (RoHS compliant)
Applications
WLAN cards
- PCMCIA, Cardbus32, MiniPCI cards
- Compact flash cards
Hand-held instruments
Related Literature
TB363 - Guidelines for Handling and Processing Moisture
Sensitive Surface Mount Devices (SMDs)
TB389 - PCB Land Pattern Design and Surface Mount
Guidelines for QFN Packages
Ordering Information
PART NUMBER*
(Note)
PART
MARKING
TEMP.
RANGE (°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL6455IRZ
6455IRZ
-40 to 85
24 Ld QFN L24.4x4B
ISL6455AIRZ
6455AIRZ
-40 to 85
24 Ld QFN L24.4x4B
Add “-TK” or T5K suffix for tape and reel.
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are 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.
Data Sheet
December 21, 2005
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ISL6455AEVAL1Z | 功能描述:EVALUATION BOARD FOR ISL6455A RoHS:是 類別:編程器，開發系統 >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩壓器拓撲結構:升壓 頻率 - 開關:3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| ISL6455AIRZ | 功能描述:電流型 PWM 控制器 SYNC BUCK PWMG DLLDO 5V INP 24LD 4X4 RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| ISL6455AIRZS2698 | 功能描述:IC REG TRPL SYNC DUAL LDO 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數:1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
| ISL6455AIRZ-T5K | 功能描述:電流型 PWM 控制器 SYNC BUCK PWMG DLLDO 5V INP 24LD 4X4 RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| ISL6455AIRZ-T5KS2698 | 功能描述:IC REG TRPL SYNC DUAL LDO 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數:1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
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