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目录
一,产品概述(General Description)
The JTM3410 are high-efficiency, high frequencysynchronous step-down
DC-DC regulator ICs capable of delivering up to 1.5A output currents. The
JTM3410 can operate over a wide inpu tvoltage range from 2.3V to 6.0V and integrate main switch and synchronous switch with very low RDS(ON)
to minimize the conduction loss.
It is ideal for powering portable equipment that runs from a single cell
Lithium-Ion (Li+) battery. The JTM3410 output voltage can be regulated as low
as 0.6V. The JTM3410 can also run at 100% duty cycle for low dropout operation, extending battery life in portable system. This device offers two operation modes,
PWM control and PFM Mode switching control,which allows a high efficiency over the wider range of the load.
The JTM3410 is off ered in a low profile (1mm)5-pin, thin SOT package, and is available in an adjustable version.
二.产品特点(Features)
High Efficiency: Up to 96%
1.0MHz Constant Frequency Operation
2A Output Current
No Schottky Diode Required
2.3V to 6V Input Voltage Range
Output Voltage as Low as 0.6V
PFM Mode for High Efficiency in Light Load
100% Duty Cycle in Dropout Operation
Low Quiescent Current: 40μA
Short Circuit Protection
Thermal Fault Protection
Inrush Current Limit and Soft Start
Input overvoltage protection(OVP)
<1μA Shutdown Current
SOT23-5 package
三,应用范围 (Applications)
Cellular and Smart Phones
Wireless and DSL Modems
PDAs
Portable Instruments
Digital Still and Video Cameras
PC Cards
四.技术规格书下载（产品PDF）
五,产品封装图 (Package)
|
PIN |
NAME |
FUNCTION |
|
1 |
RUN |
Chip Enable Pin. Drive RUN above 1.5V to turn on the part. Drive
RUN below 0.3V to turn it off. Do not leave RUN floating. |
|
2 |
GND |
Ground Pin |
|
3 |
SW |
Power Switch Output. It is the switch node connection to Inductor.
This pin connects to the drains of the internal P-ch and N-ch MOSFET
switches. |
|
4 |
VIN |
Power Supply Input. Must be closely decoupled to GND with a 10µF
or greater ceramic capacitor. |
|
5 |
VOUT |
Output Voltage Feedback Pin. An internal resistive divider divides the
output voltage down for comparison to the internal reference voltage. |
六.电路原理图
七,功能概述
Regulated Feedback Voltage
Regulated Feedback Voltage
Oscillation FrequencyVout=100%
Vout=0V
Peak Current Limit
|
Parameter |
Conditions |
MIN |
TYP |
MAX |
unit |
|
Input Voltage Range |
|
2.3 |
|
6.0 |
V |
|
UVLO Threshold |
|
1.7 |
1.9 |
2.1 |
V |
Input DC Supply Current
PWM Mode
PFM Mode
Shutdown Mode |
(Note 4)
Vout = 90%, Iload=0mA
Vout = 105%, Iload=0mA
VRUN = 0V, VIN=4.2V |
|
140
35
0.1 |
300
70
1.0 |
µA
µA
µA
µA |
|
Regulated Feedback Voltage |
TA = 25°C |
0.588 |
0.600 |
0.612 |
V |
|
TA = 0°C ≤ TA ≤ 85°C |
0.586 |
0.600 |
0.613 |
V |
|
TA = -40°C ≤ TA ≤ 85°C |
0.585 |
0.600 |
0.615 |
V |
Reference Voltage Line
Regulation |
Vin=2.3V to 6.0V |
|
0.04 |
0.40 |
%/V |
Output Voltage Line
Regulation |
VIN = 2.3V to 6.0V |
|
0.04 |
0.4 |
% |
Output Voltage Load
Regulation |
|
|
0.5 |
|
% |
|
Oscillation Frequency |
Vout=100%
Vout=0V |
|
1.0 |
|
MHz |
|
|
300 |
|
KHz |
|
On Resistance of PMOS |
ISW=100mA |
|
0.2 |
|
Ω |
|
ON Resistance of NMOS |
ISW=-100mA |
|
0.13 |
|
Ω |
|
Peak Current Limit |
VIN= 3V, Vout=90% 3410A |
|
2.5 |
|
A |
|
VIN= 3V, Vout=90% 3410 |
|
2.5 |
|
A |
|
RUN Threshold |
|
0.30 |
1.0 |
1.50 |
V |
|
RUN Leakage Current |
|
|
±0.01 |
±1.0 |
µA |
|
SW Leakage Current |
VRUN=0V,VIN=Vsw=5V |
|
±0.01 |
±1.0 |
µA |
八,相关芯片选择指南
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低压同步DC-DC降压IC |
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型号 |
输入耐压 |
输出电压 |
输出 |
反馈 |
工作 |
效率 |
静态 |
待机 |
封装 |
直接替换 |
|
电流 |
电压 |
频率 |
工作电流 |
电流 |
|
JTM3406 |
2.0V--6.0V |
1.2V/1.8V/3.3V |
0.7A |
0.6V |
1.5MHz |
96% |
20uA |
|
SOT-25 |
LTC3406/RT8008/RT8024/SY8008A |
|
可调输出 |
|
JTM3416 |
2.0-6.0V |
可调输出 |
1.0A |
0.6V |
1.5M |
96% |
20uA |
1uA |
SOT-25 |
SY8008A/B/AT1366/LTC3406/RT8008/ |
|
ACT6906/LM3671/MP2104/APW7101/ |
|
RT8024/FP6161/EUP3406/8/EUP2571/ |
|
PAM2301/5/LP3206/G5628/RT8059/TCS4112 |
|
JTM3416A |
2.3-6.0V |
可调输出 |
1.2A |
0.6V |
1.5M |
96% |
35uA |
1uA |
SOT-25 |
SY8008C/ACT6906/APW7101 |
|
RT8024/FP6161/G5628 |
|
JTM3416B |
2.3-6.0V |
可调输出 |
1.5A |
0.6V |
1.5M |
96% |
35uA |
1uA |
SOT-25 |
SY8009A/ACT6906/LM3671/MP2104 |
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APW7101/RT8024/FP6161/G5628/TT8515 |
|
JTM3420 |
2.0-6.5V |
可调输出 |
2.0A |
0.6V |
1.5M |
96% |
40uA |
1uA |
SOT-26 |
SY8009B/ACT6906/LM3671/MP2104 |
|
APW7101/RT8024/FP6161/LP3208/TT8212 |
|
JTM3420B |
2.6-6.0V |
可调输出 |
2.0A |
0.6V |
3M |
96% |
30uA |
0.1uA |
SOT-25 |
SY8089/A |
|
JTM3420S |
2.3-6.5V |
可调输出 |
2.0A |
0.6V |
1.5M |
96% |
40uA |
40uA |
SOP-8 |
SY8012/SY8013/SY8082/SY8083/ |
|
PAM2307/EUP3410 |
|
JTM3430S |
2.3-6.5V |
可调输出 |
3.0A |
0.6V |
1.5M |
95% |
40uA |
40uA |
ESOP-8 |
SY8012/SY8013/SY8082/SY8083/ |
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PAM2307/EUP3410 |
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高压同步DC-DC降压IC |
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型号 |
输入耐压 |
输出电压 |
输出 |
反馈 |
工作 |
效率 |
静态 |
待机 |
封装 |
直接替换 |
|
电流 |
电压 |
频率 |
工作电流 |
电流 |
|
JTM1482 |
4.6-22V |
可调输出 |
2.0A |
0.923V |
340K |
94% |
55uA |
1uA |
SOP-8 |
MP1482/ZT7182/LSP5502 |
|
MP1482 |
EUP3482/AS5422/AME5269 |
|
JTM1482A |
4.5-27V |
可调输出 |
2.0A |
0.925V |
340K |
96% |
1.3mA |
0.3uA |
SOP-8 |
MP1482/ZT7182/LSP5502 |
|
EUP3482/AS5422/AME5269 |
|
JTM1484 |
4.6-22V |
可调输出 |
3.0A |
0.923V |
340K |
95% |
55uA |
1uA |
ESOP8 |
MP1484/MP2307/APW7174/EUP3484 |
|
MP1484 |
EUP3476/RT8272/AS5430/RT8250 |
|
JTM1484A |
4.5-27V |
可调输出 |
3.0A |
0.925V |
340K |
93% |
1.3mA |
0.3uA |
ESOP8 |
MP1484/MP2307/APW7174/EUP3484 |
|
EUP3476/RT8272/AS5430/RT8250 |
|
JTM1486 |
3.6-40V |
可调输出 |
2.0A |
0.8V |
440K |
94% |
74uA |
0.07uA |
ESOP-8 |
|
|
JTM1488 |
4.5-20V |
可调输出 |
4.0A |
0.923V |
340KHz |
95% |
1.6mA |
6uA |
ESOP8 |
MP1484/MP2307/APW7174/EUP3484 |
|
EUP3476/RT8272/AS5430/RT8250 |
|
JTM2259 |
4.5-16V |
可调输出 |
2.0A |
0.6V |
600K |
96% |
400uA |
1uA |
SOT-26 |
MP2259/MP2359/ACT4088 |
|
MP28367/RT8259 |
|
JTM2359 |
4.5-26V |
可调输出 |
1.2A |
0.8V |
1.4M |
94% |
600uA |
1uA |
SOT-26 |
MP2359/MP2259/ACT4088 |
|
MP28367/RT8259 |
|
JTM2459 |
4.0-42V |
可调输出 |
1.5A |
0.8V |
650K |
91% |
600uA |
6uA |
SOT-26 |
MP2359/MP2259/ACT4088 |
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MP28367/RT8259 |
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双路同步DC-DC降压IC |
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型号 |
输入耐压 |
输出电压 |
输出电流 |
反馈电压 |
工作频率 |
效率 |
静态工作电流 |
待机电流 |
封装 |
直接替换 |
|
JTM8021 |
3.0V-6.0V |
双路可调 |
1.5A |
0.6V |
1.5MHz |
90% |
|
10uA |
ESOP-8 |
SY8021/L |
|
JTM8022 |
2.3V-6.0V |
双路可调 |
2A |
0.6V |
1.5MHz |
90% |
150uA |
0.1uA |
ESOP-8 |
SY8022/L |
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