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參數(shù)資料
型號： LTC3445
廠商： Linear Technology Corporation
英文描述： 12-Bit To 24-Bit Multiplexed D-Type Latch With 3-State Outputs 56-SSOP -40 to 85
中文描述： 降壓穩(wěn)壓器的I2C可控雙采用4mm？4mm QFN封裝LDO的
文件頁數(shù)： 2/24頁
文件大小： 465K
代理商： LTC3445
2
LTC3445
3445fa
Order Options
Tape and Reel: Add #TR
Lead Free Part Marking:
http://www.linear.com/leadfree/
ORDER PART NUMBER
LTC3445EUF
(Note 1)
V
CC1
, V
CC2
, SDA, SCL Voltages .................. –0.3V to 6V
RUN, V
TRACK
, V
BACKUP
, PGOOD, ADD7,
ADD6, FB, V
CC
BATT,
BATTFAULT Voltages.............................. –0.3V to V
CC1
SW Voltage................................ –0.3V to (V
CC1
+ 0.3V)
LDO1FB, LDO2FB Voltages..................... –0.3V to V
CC2
LDO1, LDO2 Voltages................ –0.3V to (V
CC2
+ 0.3V)
LDO1, LDO2 Source Current ............................... 50mA
V
CC
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, V
CC
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
ABSOLUTEW
W
W
U
PACKAGE/ORDER U
U
W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
T
JMAX
= 125
°
C,
θ
JA
= 37
°
C/W,
θ
JC
= 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
V
TRACK
V
BACKUP
V
CC1
PGOOD
ADD7
SDA
V
CC
BATT
FB
NC
RUN
SW
NC
L
L
V
C
L
L
B
N
S
A
V
C
G
N
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25
°
C. V
CC1
= V
CC2
= 3.6V, unless otherwise noted.
SYMBOL
PARAMETER
V
CC1,
V
CC2
Input Voltage Range
RUN
Run Threshold
PGOOD
Reports Undervoltage of any Regulator
I
S
DC Bias Current (Shutdown)
DC Bias Current (Buck, LDO1, LDO2 Disabled)
Buck Regulator
R
FB
Feedback Resistance
V
OUT(MIN)
Regulated Output Voltage
ELECTRICAL CHARACTERISTICS
UF PART MARKING
3445
CONDITIONS
MIN
2.5
0.3
3
TYP
MAX
5.5
1.5
UNITS
●
V
V
●
1
PGOOD = 0.4V
RUN = 0
RUN = V
CC1
●
mA
μ
A
μ
A
27
105
50
150
340
0.850
k
I
OUT
= 100mA, Burst Mode Operation
Disabled
I
OUT
= 100mA, Burst Mode Operation
Disabled
I
OUT
= 100mA
I
OUT
= 100mA, V
OUT
= 0.85V to 1.55V
I
OUT
= 100mA, V
OUT
= 0.85V to 1.55V
I
OUT
= 100mA, V
OUT
= 0.85V to 1.55V
I
OUT
= 100mA, V
OUT
= 0.85V to 1.55V
V
CC1
= 3V, V
FB
= 0.5V or V
OUT
= 90%,
Duty Cycle < 35%
●
0.824
0.875
V
V
OUT(MAX)
Regulated Output Voltage
●
1.504
1.55
1.597
V
V
OUT(STEP)
Output Voltage Step Size (0 to 48)
Output Voltage Slew Rate = 00
Output Voltage Slew Rate = 01
Output Voltage Slew Rate = 10
Output Voltage Slew Rate = 11
Peak Inductor Current
●
13.1
14.7
11.3
7.5
3.8
0.9
1
16.1
mV
mV/
μ
s
mV/
μ
s
mV/
μ
s
mV/
μ
s
I
PK
0.75
1.25
A
V
LOADREG
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
LTC3445EUF 制造商:Linear Technology 功能描述:Conv DC-DC Triple Step Down 2.5V to 5.5V 24-Pin QFN EP
LTC3445EUF#PBF 功能描述:IC REG TRPL BUCK/LINEAR 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 + 切換式 系列:- 標準包裝:2,500 系列:- 拓撲: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)動器:無 帶監(jiān)控器:無 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:*
LTC3445EUF#TR 制造商:Linear Technology 功能描述:Conv DC-DC Triple Step Down 2.5V to 5.5V 24-Pin QFN EP T/R
LTC3445EUF#TRPBF 功能描述:IC REG TRPL BUCK/LINEAR 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 線性 + 切換式 系列:- 標準包裝:2,500 系列:- 拓撲: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)動器:無 帶監(jiān)控器:無 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:*
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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