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目录
一,产品概述(General Description)
The JTMT9103/JTMT9104/JTMT9105 series are PWM, PWM/PFM auto switching /manual switching controlled universal
step-up DC/DC converter controllers. Output will be stable no matter which load capacitors are used but should a low ESR
capacitor be used, RSENSE of about 0.1Ωwill be required and phase compensation will be achieved. This allows the use of
ceramic capacitors and enables to obtain lower output ripple and small PCB design. Tantalum and electrolytic capacitors can
also be used, in which case, RSENSE becomes unnecessary. With 0.9V internal voltage reference and by using externally
connected two resistors, output voltage can be set freely within a range of 1.5V to 30V. The series is available in 300 kHz
and 180 kHz frequencies, the size of the external components can be reduced. 100 kHz and 500 kHz are also available in
custom options. The JTMT9103 offers PWM operation. The JTMT9104 offers PWM/PFM automatic switching operation.
The PWM operation is shifted to the PFM operation automatically at light load so that it maintains high efficiency over a
wide range of load currents. The JTMT9105 offers both PWM and PWM/PFM auto switching operations and it can be
selected by external signal. A current limiter circuit is built-in to the IC (eJTMTept with the 500 kHz version) and monitors
the ripple voltage on the FB pin. Operation is shut down when the ripple voltage is more than 250mV. The operations of the
IC can be returned to normal with a toggle of the CE pin or by turning the power supply back on.
二.产品特点(Features)
|
Controls |
PWM, PWM/PFM |
|
Input Voltage Range |
0.9V~10V |
|
Power Supply Voltage Range |
1.8V~10V |
|
Output Voltage Range |
1.5V~30V,Can be set freely with 0.9V(±2.0V) of reference voltage supply and external registors. |
|
Oscillation Frequency |
100,180,300,500kHz(±15%),180,300kHz only for JTMT9103/04/05B type |
|
Output Current |
more than 400mA (VIN=1.8V, VOUT=3.3V) |
|
High Efficiency |
85% |
|
Stand-by Current |
ISTB=1.0μA(MAX.) |
|
Load Capacitors |
Low ESR capacitors compatible |
|
Current Limiter Function |
Operates when ripple voltage=250mV ,Also available without current limiter ,(500kHz type is available only without current limiter) |
|
Package: |
SOT-25,USP-6B |
三,应用范围 (Applications)
●E-book Readers / Electronic dictionaries
●Smart phones / Mobile phones
●Note PCs / Tablet PCs
●Digital audio equipments
●Multi-function power supplies
四.技术规格书下载（产品PDF）
五,产品封装图 (Package)
六.电路原理图
七,功能概述
|
PARAMETER |
SYMBOL |
RATINGS |
UNITS |
|
VDD pin Voltage |
VDD |
-0.3 ~ 12.0 |
V |
|
FB pin Voltage |
FB |
-0.3 ~ 12.0 |
V |
|
CE pin Voltage |
VCE |
-0.3 ~ 12.0 |
V |
|
EXT pin Voltage |
VEXT |
-0.3 ~ VDD + 0.3 |
V |
|
EXT pin Current |
IEXT/ |
±100 |
mA |
|
Power Dissipation |
SOT-25 |
Pd |
250 |
mW |
|
USP-6B |
120 |
|
Operating Ambient Temperature |
|
Topr |
-40 ~ +85 |
℃ |
|
Storage Temperature |
Tstg |
-55 ~ +125 |
℃ |
八,相关芯片选择指南
|
系列名称 |
特点 |
输入电压 |
输出电压 |
最大输出电流 |
振荡频率 |
内置FET |
封装 |
|
(V) |
(V) |
(mA) |
|
最小 |
最大 |
最小 |
最大 |
|
|
JTMT6367 |
PWM/PFM |
0.9 |
10 |
1.5 |
6.5 |
1000 |
100kHz |
None |
SOT-25 |
|
JTMT6368 |
180kHz |
|
|
300kHz |
|
|
500kHz |
|
JTMT6371 |
PWM/PFM |
0.9 |
10 |
2 |
7 |
100 |
50kHz |
Nch FET |
SOT-89 |
|
JTMT6372 |
100kHz |
SOT-89-5 |
|
|
180kHz |
USP-6B |
|
JTMT9101 |
PWM |
2.5 |
20 |
2.2 |
30 |
1500 |
100~600kHz |
None |
MSOP-8A |
|
JTMT9103 |
PWM/PFM |
0.9 |
10 |
1.5 |
30 |
1000 |
100kHz |
None |
SOT-25 |
|
JTMT9104 |
180kHz |
USP-6B |
|
JTMT9105 |
300kHz |
|
|
|
500kHz |
|
|
JTMT9106 |
PWM/PFM |
0.9 |
10 |
1.5 |
30 |
1000 |
100kHz |
None |
SOT-25 |
|
JTMT9107 |
300kHz |
USP-6B |
|
JTMT9110 |
PFM |
0.9 |
10 |
1.5 |
7 |
100 |
100kHz |
Nch FET |
SOT-23 |
|
JTMT9111 |
SOT-25 |
|
|
SOT-89 |
|
|
USP-6C |
|
JTMT9116 |
Backlight LED Driver |
2.5 |
6 |
8 |
18 |
20 |
1MHz |
Nch FET |
SOT-25 |
|
USP-6B |
|
JTMT9119 |
PWM |
2.5 |
6 |
10 |
18 |
100 |
1MHz |
Nch FET |
SOT-25 |
|
USP-6C |
|
JTMT9120 |
PWM/PFM |
0.9 |
6 |
1.5 |
30 |
80 |
100kHz |
None |
SOT-25 |
|
JTMT9121 |
USP-6C |
|
JTMT9122 |
|
|
JTMT9128 |
1A Driver Transistor Built-In |
0.8 |
6 |
1.8 |
5.3 |
500 |
1.2MHz |
Nch FET |
MSOP-10 |
|
JTMT9129 |
Pch FET |
USP-10B |
|
JTMT9131 |
Load Disconnection Function |
0.65 |
5.5 |
1.8 |
5 |
500 |
1.2MHz |
Nch FET |
USP-10B |
|
Pch FET |
|
JTMT9133 |
LED Backlight |
2.5 |
6 |
2.5 |
17.5 |
20 |
1MHz |
MOSFET |
SOT-25 |
|
JTMT9135 |
1A Driver Transistor Built-In |
0.65 |
5.5 |
1.8 |
5 |
500 |
1.2MHz |
Nch FET |
USP-10B |
|
JTMT9136 |
Pch FET |
|
JTMT9140 |
Synchronous PFM |
0.9 |
5.5 |
1.8 |
5 |
100 |
- |
N-ch Driver Tr |
SOT-25 |
|
P-ch Synchronous Switch Transistor |
USP-6EL |
|
JTMT9141 |
Load Disconnection Function |
0.65 |
6 |
1.8 |
5.5 |
350 |
1.2MHz |
Nch FET |
SOT-25 |
|
JTMT9142 |
3.0MHz |
Pch FET |
USP-6C |
|
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|
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WLP-6-01 |
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