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参数资料
| 型号： | LM21215MHX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 23.5 A SWITCHING REGULATOR, 525 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | TSSOP-20 |
| 文件页数： | 18/24页 |
| 文件大小： | 512K |
| 代理商： | LM21215MHX |
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
PVIN(Note 2), AVIN to GND
0.3V to +6V
SW(Note 3), EN, FB, COMP,
PGOOD, SS/TRK to GND
0.3V to PVIN + 0.3V
Storage Temperature
65°C to 150°C
Lead Temperature
(Soldering, 10 sec.)
260°C
ESD Rating
Human Body Model (Note 4)
±2kV
Operating Ratings (Note 1)
PVIN, AVIN to GND
+2.95V to +5.5V
Junction Temperature
40°C to +125°C
θ
JA
(Note 5)
24°C/W
Electrical Characteristics Unless otherwise stated, the following conditions apply: V
PVIN, AVIN = 5V. Limits in
standard type are for T
J = 25°C only, limits in bold face type apply over the junction temperature (TJ) range of 40°C to +125°C.
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.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
SYSTEM
V
FB
Feedback pin voltage
V
IN = 2.95V to 5.5V
-1%
0.6
1%
V
ΔV
OUT/ΔIOUT
Load Regulation
0.02
%V
OUT/
A
ΔV
OUT/ΔVIN
Line Regulation
0.1
%V
OUT/
V
R
DSON HS
High Side Switch On Resistance
I
SW = 12A
7
9.0
m
R
DSON LS
Low Side Switch On Resistance
I
SW = 12A
4.3
6.0
m
I
CLR
HS Rising Switch Current Limit
R
ILIM = 16.5 k
16.5
20
23.5
A
R
ILIM = 41.3 k
8.5
10
11.5
R
ILIM = 130 k
3.8
I
CLF
LS Falling Switch Current Limit
R
ILIM = 16.5 k
14.5
A
R
ILIM = 41.3 k
7.5
R
ILIM = 130 k
3
V
ZX
Zero Cross Voltage
-8
3
12
mV
I
Q
Operating Quiescent Current
1.5
3
mA
I
SD
Shutdown Quiescent Current
V
EN = 0V
50
70
A
V
UVLO
AVIN Under Voltage Lockout
AVIN Rising
2.45
2.7
2.95
V
UVLOHYS
AVIN Under Voltage Lockout Hysteresis
140
200
280
mV
V
TRACKOS
SS/TRACK PIN accuracy (V
SS - VFB)
0 < V
TRACK < 0.55V
-10
6
20
mV
I
SS
Soft-Start Pin Source Current
1.3
1.9
2.5
A
t
INTSS
Internal Soft-Start Ramp to Vref
C
SS = 0
350
500
675
s
t
RESETSS
Device reset to soft-start ramp
50
110
200
s
OSCILLATOR
f
OSC
Switching Frequency
475
500
525
kHz
t
HSBLANK
HS OCP blanking time
Rising edge of SW to I
CLR
comparison
55
ns
t
LSBLANK
LS OCP blanking time
Falling edge of SW to I
CLF
comparison
400
ns
t
ZXBLANK
Zero Cross blanking time
Falling edge of SW to V
ZX
comparison
120
ns
t
MINON
Minimum HS on-time
140
ns
ΔV
RAMP
PWM Ramp p-p Voltage
0.8
V
ERROR AMPLIFIER
V
OL
Error Amplifier Open Loop Voltage Gain
ICOMP = -65A to 1mA
95
dBV/V
3
www.national.com
LM21215
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM21215MHX/NOPB | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM212B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Optoelectronic |
| LM212D | 制造商:TI 制造商全称:Texas Instruments 功能描述:OPERATIONAL AMPLIFIERS/BUFFERS |
| LM212H | 制造商:Motorola Inc 功能描述: |
| LM212JG | 制造商:TI 制造商全称:Texas Instruments 功能描述:OPERATIONAL AMPLIFIERS/BUFFERS |
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