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參數(shù)資料
| 型號： | LTC3569EUD#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.5 A SWITCHING REGULATOR, 3000 kHz SWITCHING FREQ-MAX, PQCC20 |
| 封裝： | 3 X 3 MM, LEAD FREE, PLASTIC, QFN-20 |
| 文件頁數(shù)： | 1/26頁 |
| 文件大?。?/td> | 468K |
| 代理商： | LTC3569EUD#TRPBF |
LTC3569
1
3569fd
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
Triple Buck Regulator with
1.2A and Two 600mA Outputs and
Individual Programmable References
The LTC3569 contains three monolithic, synchronous
step-downDC/DCconverters.Intendedformediumpower
applications, it operates over a 2.5V to 5.5V input voltage
range. The operating frequency is adjustable from 1MHz
to 3MHz, allowing the use of tiny, low cost capacitors and
inductors. The three output voltages are independently
programmable by toggling the EN pins up to 15 times,
lowering the 800mV FB references by 25mV per cycle. The
first buck regulator sources load currents up to 1200mA.
The other two buck regulators each provide 600mA.
The two 600mA buck regulators can also be configured
to operate as slave power stages, running in parallel with
another internal buck regulator to supply higher load
currents. When operating as parallel, slave output stages,
discrete external components are shared and available
output currents sum together.
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents including 5481178, 6127815, 6304066,
6498466, 6580258, 6611131, 7170195.
Efficiency vs Load Current
n
Three Independent Current Mode Buck DC/DC
Regulators (1.2A and 2
× 600mA)
n
Single Pin Programmable VFB Servo Voltages from
800mV Down to 425mV (in 25mV Steps)
n
Pull VFB High to Make Each 600mA Buck a Slave for
Higher Current Operation
n
Pulse-Skipping or Burst Mode Operation
n
Programmable Switching Frequency
(1MHz to 3MHz) or Fixed 2.25MHz
n
Synchronizable (1.2MHz to 3MHz)
n
VIN Range 2.5V to 5.5V
n
All Regulators Internally Compensated
n
PGOOD Output Flag
n
Quiescent Current <100A (All Regulators in Burst
Mode Operation)
n
Zero Shutdown Current
n
Overtemperature and Short-Circuit Protection
n
Tiny 3mm
× 3mm, 3mm × 4mm 20-Lead QFN and
Thermally Enhanced TSSOP FE-16 Packages
n
Portable Applications with Multiple Supply Rails
n
General Purpose Step-Down DC/DC
n
Dynamic Voltage Scaling Applications
3569 TA01a
SVIN PVIN SW1
PGND
SGND
SW2
SW3
PGOOD
FB1
EN1
EN2
EN3
MODE
RT
FB2
FB3
22F
VIN
2.2H*
10F
20pF
4.7F
2.5H**
510k
240k
300k
240k
OUT1 = 2.5V
1200mA
OUT2 = 1.8V
600mA
4.7F
2.5H**
150k
300k
OUT3 = 1.2V
600mA
LTC3569
* WURTH 7440430022
** WURTH 744031002
ILOAD (mA)
EFFICIENCY
(%)
3569 TA01b
100
90
80
70
60
50
40
30
20
10
0
0.01
0.1
1
1000 10000
100
10
VIN = 3V
VIN = 5V
Burst Mode OPERATION
PULSE-SKIPPING
OUT1 = 2.5V
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|---|---|
| LTC3569IFE#PBF | 功能描述:IC REG BUCK SYNC ADJ 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3569IFE#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3569IFE-PBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Triple Buck Regulator With 1.2A and Two 600mA Outputs and Individual Programmable References |
| LTC3569IFE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Triple Buck Regulator With 1.2A and Two 600mA Outputs and Individual Programmable References |
| LTC3569IUD#PBF | 功能描述:IC REG BUCK SYNC ADJ TRPL 20QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
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