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| 型号： | MAX1833ETT30+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST SYNC 3V 0.15A 6TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 升压（升压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 3V |
| 输入电压： | 1.5 V ~ 5.5 V |
| 电流 - 输出： | 150mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 6-WDFN 裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 6-TDFN 裸露焊盘（3x3） |
| 其它名称： | MAX1833ETT30+TDKR |
High-Efficiency Step-Up Converters with
Reverse Battery Protection
sometimes cause false shutdowns. To minimize the effect
of ripple, connect a low-value capacitor (C1) from SHDN
to GND to filter out input noise. Select a C1 value such
Table 1. Suggested Inductors and
Suppliers
that the R4 ? C1 time constant is above 2ms.
Power-On Reset
The MAX1833/MAX1835 provide a power-on reset out-
put ( RST ). A 100k ? to 1M ? pullup resistor from RST to
OUT provides a logic control signal. This open-drain
output pulls low when the output is 10% below its regu-
MANUFACTURER
Coilcraft
Sumida
INDUCTOR
DS1608C-103
DO1606T-103
CDRH4D18-100
CR43-100
PHONE
847-639-6400
847-956-0666
lation point. If not used, connect it to GND. RST is high
impedance in shutdown.
Murata
LQH4N100K
814-237-1431
Setting the Output Voltage
The output voltage of the MAX1832/MAX1834 is
adjustable from +2V to +5.5V, using external resistors
R1 and R2 (Figure 1b). Since FB leakage is 20nA
(max), select feedback resistor R1 to be 100k ? to
1M ? . Calculate R2 as follows:
Table 2. Suggested Surface-Mount
Capacitors and Manufacturers
VALUE MANU-
DESCRIPTION PHONE
(μF) FACTURER
R 2 = R 1 ? OUT ? 1 ?
? V ?
? V FB ?
where V FB = 1.228V.
Inductor Selection
The control scheme of the MAX1832–MAX1835 permits
flexibility in choosing an inductor. A 10μH inductor per-
forms well for most applications, but values from 4.7μH to
100μH may also be used. Small inductance values typi-
4.7 to
47
4.7 to
10
4.7 to
22
594/595 D-
series tantalum
TAJ, TPS-
series tantalum
X7R ceramic
X7R ceramic
Sprague
AVX
TDK
Taiyo Yuden
603-224-1961
803-946-0690
847-390-4373
408-573-4150
cally offer smaller physical size. Large inductance values
minimize output ripple but reduce output power. Output
power is reduced when the inductance is large enough to
prevent the maximum current limit (525mA) from being
reached before the maximum on-time (5μs) expires.
For maximum output current, choose L such that:
capacitor is a good starting value. The input capacitor
reduces the peak current drawn from the battery and
can be the same value as the output capacitor. A larger
input capacitor can be used to further reduce ripple and
improve efficiency.
V BATT ( MAX ) ( 1 μ s )
0 . 525 A
< L <
V BATT ( MIN ) ( 5 μ s )
0 . 525 A
PC Board Layout and Grounding
Careful printed circuit layout is important for minimizing
ground bounce and noise. Keep the IC’s GND pin and
I OUT ( MAX ) = 0 . 525 A ×
2
V BATT ( MIN ) ?
0 . 525 A
2
V OUT
( R NCH + R IND )
the ground leads of the input and output filter capaci-
tors less than 0.2in (5mm) apart. In addition, keep all
connections to the FB and LX pins as short as possible.
In particular, when using external feedback resistors,
where R IND is the inductor series resistance, and R NCH
is the R DS(ON) of the N-channel MOSFET (0.4 ? typ).
Capacitor Selection
Choose an output capacitor to achieve the desired out-
put ripple percentage.
locate them as close to FB as possible. To maximize
output power and efficiency and minimize output ripple
voltage, use a ground plane and solder the IC’s GND
directly to the ground plane.
Chip Information
C OUT >
0 . 5 × L × 0 . 525 A 2
r % × V OUT 2
TRANSISTOR COUNT: 953
PROCESS: BiCMOS
where r is the desired output ripple in %. A 10μF ceramic
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1833EUT | 制造商:Maxim Integrated Products 功能描述:HIGH-EFFICIENCY STEP-UP CONVERTER - Rail/Tube |
| MAX1833EUT#G16 | 制造商:Maxim Integrated Products 功能描述:HIGH-EFFICIENCY STEP-UP CONVERTERS WITH REVERSE BATTERY PROT - Bulk |
| MAX1833EUT#TG16 | 功能描述:直流/直流开关转换器 Step-Up Converter w/Reverse Bat Prtct 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 |
| MAX1833EUT-T | 功能描述:直流/直流开关转换器 Step-Up Converter w/Reverse Bat Prtct 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 |
| MAX1833EVKIT | 功能描述:直流/直流开关转换器 Evaluation Kit for the MAX1832 MAX1833 MAX1834 MAX1835 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 |
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