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参数资料
| 型号： | LM34919BTL |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, PBGA10 |
| 封装： | MICRO, SMD-10 |
| 文件页数： | 15/20页 |
| 文件大小： | 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
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM34919BTL/NOPB | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LM34919BTLX | 制造商:NSC 制造商全称: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/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LM34919C-Q1 | 制造商:TI 制造商全称: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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