參數(shù)資料
型號(hào)： LTC3445EUF#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 0.8 A SWITCHING REGULATOR, 1800 kHz SWITCHING FREQ-MAX, PQCC24
封裝： 4 X 4 MM, PLASTIC, MO-220-WGGD, QFN-24
文件頁(yè)數(shù)： 12/24頁(yè)
文件大?。?/td> 470K
代理商： LTC3445EUF#TR
2
LTC3445
3445fa
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF
Lead Free Tape and Reel: Add #TRPBF
ORDER PART NUMBER
(Note 1)
ABSOLUTE
AXI U
RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UU
W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC3445EUF
TJMAX = 125°C, θJA = 37°C/W, θJC = 2.6°C/W
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
24 23 22 21 20 19
7
8
9
TOP VIEW
25
UF PACKAGE
24-LEAD (4mm
× 4mm) PLASTIC QFN
10 11 12
6
5
4
3
2
1
13
14
15
16
17
18
VTRACK
VBACKUP
VCC1
PGOOD
ADD7
SDA
VCC BATT
FB
NC
RUN
SW
NC
LDO2FB
LDO2
V
CC2
LDO1
LDO1FB
BATTFAULT
NC
SCL
ADD6
V
CC1
GND
NC
The
● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC1 = VCC2 = 3.6V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
UF PART MARKING
3445
VCC1, VCC2, SDA, SCL Voltages .................. –0.3V to 6V
RUN, VTRACK, VBACKUP, PGOOD, ADD7,
ADD6, FB, VCC BATT,
BATTFAULT Voltages .............................. – 0.3V to VCC1
SW Voltage ................................ – 0.3V to (VCC1 + 0.3V)
LDO1FB, LDO2FB Voltages ..................... – 0.3V to VCC2
LDO1, LDO2 Voltages ................ – 0.3V to (VCC2 + 0.3V)
LDO1, LDO2 Source Current ............................... 50mA
VCC BATT Source Current ...................................... 8mA
P-Channel Switch Source Current (DC) ............. 800mA
N-Channel Switch Sink Current (DC) ................. 800mA
Peak SW Sink and Source Current ........................ 1.3A
LDO1, LDO2, VCC BATT Output Short-Circuit
Duration .......................................................... Indefinite
Operating Temperature Range (Note 2) ...–40
°C to 85°C
Junction Temperature (Note 3) ............................ 125
°C
Storage Temperature Range ................. –65
°C to 125°C
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCC1, VCC2
Input Voltage Range
●
2.5
5.5
V
RUN
Run Threshold
●
0.3
1
1.5
V
PGOOD
Reports Undervoltage of any Regulator
PGOOD = 0.4V
●
3mA
IS
DC Bias Current (Shutdown)
RUN = 0
27
50
A
DC Bias Current (Buck, LDO1, LDO2 Disabled)
RUN = VCC1
105
150
A
Buck Regulator
RFB
Feedback Resistance
340
k
VOUT(MIN)
Regulated Output Voltage
IOUT = 100mA, Burst Mode Operation
●
0.824
0.850
0.875
V
Disabled
VOUT(MAX)
Regulated Output Voltage
IOUT = 100mA, Burst Mode Operation
●
1.504
1.55
1.597
V
Disabled
VOUT(STEP)
Output Voltage Step Size (0 to 48)
IOUT = 100mA
●
13.1
14.7
16.1
mV
Output Voltage Slew Rate = 00
IOUT = 100mA, VOUT = 0.85V to 1.55V
11.3
mV/
s
Output Voltage Slew Rate = 01
IOUT = 100mA, VOUT = 0.85V to 1.55V
7.5
mV/
s
Output Voltage Slew Rate = 10
IOUT = 100mA, VOUT = 0.85V to 1.55V
3.8
mV/
s
Output Voltage Slew Rate = 11
IOUT = 100mA, VOUT = 0.85V to 1.55V
0.9
mV/
s
IPK
Peak Inductor Current
VCC1 = 3V, VFB = 0.5V or VOUT = 90%,
0.75
1
1.25
A
Duty Cycle < 35%
VLOADREG
Output Voltage Load Regulation
0.5
%
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3446 制造商:LINER 制造商全稱:Linear Technology 功能描述:Monolithic Buck Regulator with Dual VLDO Regulators
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LTC3446EDE#TRPBF 功能描述:IC REG TRPL BCK/LINEAR 14-DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 + 切換式 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 拓?fù)?降壓（降壓）同步（3），線性（LDO）（2） 功能:任何功能 輸出數(shù):5 頻率 - 開關(guān):300kHz 電壓/電流 - 輸出 1:控制器 電壓/電流 - 輸出 2:控制器 電壓/電流 - 輸出 3:控制器 帶 LED 驅(qū)動(dòng)器:無(wú) 帶監(jiān)控器:無(wú) 帶序列發(fā)生器:是 電源電壓:5.6 V ~ 24 V 工作溫度:-40°C ~ 85°C 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:*
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