參數(shù)資料
型號： LM34919BTL
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, PBGA10
封裝： MICRO, SMD-10
文件頁數(shù)： 15/20頁
文件大?。?/td> 488K
代理商： LM34919BTL
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
VIN to RTN
44V
BST to RTN
52V
SW to RTN (Steady State)
-1.5V to 44V
ESD Rating (Note 2)
Human Body Model
2kV
BST to VCC
44V
BST to SW
14V
VCC to RTN
14V
SGND to RTN
-0.3V to +0.3V
SS, RON/SD to RTN
-0.3V to 4V
FB to RTN
-0.3 to 7V
Storage Temperature Range
-65°C to +150°C
For soldering specs see:
www.national.com/ms/MS/MS-SOLDERING.pdf
JunctionTemperature
150°C
Operating Ratings (Note 1)
VIN
6.0V to 40V
Junction Temperature
40°C to + 125°C
Electrical Characteristics Specifications with standard type are for T
J = 25°C only; limits in boldface type apply
over the full Operating Junction Temperature (T
J) range. Minimum and Maximum limits are guaranteed through test, design, or
statistical correlation. Typical values represent the most likely parametric norm at T
J = 25°C, and are provided for reference
purposes only. Unless otherwise stated the following conditions apply: V
IN = 12V, RON = 20k. See (Note 4).
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Start-Up Regulator, V
CC
V
CCReg
V
CC regulated output
V
IN = 12V
6.6
7
7.4
V
IN =6V, ICC = 3 mA,
5.3
5.91
V
IN-VCC dropout voltage
I
CC = 0 mA, non-switching
V
CC = UVLOVCC + 250 mV
20
mV
V
CC Output Impedance
0 mA
≤ I
CC ≤ 5 mA, VIN = 6V
24
0 mA
≤ I
CC ≤ 5 mA, VIN = 8V
12
V
CC current limit (Note 3)
V
CC = 0V
15
mA
UVLO
VCC
V
CC under-voltage lockout threshold
measured at V
CC
V
CC increasing
5.25
V
CC decreasing
5.1
5.25
V
UVLO
VCC hysteresis, at VCC
150
mV
V
CC under-voltage lock-out threshold
measured at V
IN
V
IN increasing, ICC = 3 mA
5.25
5.6
V
IN decreasing, ICC = 3 mA
5.1
5.4
V
UVLO
VCC filter delay
100 mV overdrive
3
s
I
Q
I
IN operating current
Non-switching, FB = 3V, SW = Open
0.78
1.0
mA
I
SD
I
IN shutdown current
RON/SD = 0V, SW = Open
215
330
A
Switch Characteristics
Rds(on)
Buck Switch Rds(on)
I
TEST = 200 mA
0.5
1.0
UVLO
GD
Gate Drive UVLO
V
BST - VSW Increasing
2.65
3.6
4.40
V
BST - VSW Decreasing
3.2
UVLO
GD hysteresis
400
mV
Softstart Pin
V
SS
Pull-up voltage
2.5
V
Internal current source
V
SS = 1V
10.5
A
Current Limit
I
LIM
Threshold
Current out of ISEN
0.52
0.64
0.76
A
Resistance from ISEN to SGND
135
m
Response time
50
ns
On Timer
t
ON - 1
On-time
V
IN = 12V, RON = 20k
127
170
213
ns
t
ON - 2
On-time
V
IN = 24V, RON = 20 k
110
ns
t
ON - 3
On-time
V
IN = 6V, RON = 20 k
335
ns
Shutdown threshold
Voltage at RON/SD rising
0.4
0.74
1.2
V
www.national.com
4
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM34919BTL/NOPB 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM34919BTLX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Ultra Small 40V, 600 mA Constant On-Time Buck Switching Regulator
LM34919BTLX/NOPB 功能描述:直流/直流開關(guān)調(diào)節(jié)器 RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
LM34919C-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:LM34919C-Q1 Ultra Small 50V, 600 mA Constant On-Time Buck Switching Regulator
LM34919CQSD/NOPB 制造商:Texas Instruments 功能描述:IC REG BUCK ADJ 0.6A 12WSON
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