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参数资料
| 型号： | MAX1672EEE-T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK BOOST FIX/ADJ 16QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压），升压（升压） |
| 输出类型： | 两者兼有 |
| 输出数： | 1 |
| 输出电压： | 3.3V，5V，可调 |
| 输入电压： | 1.8 V ~ 11 V |
| 电流 - 输出： | 300mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QSOP |
Step-Up/Down DC-DC Converter
in QSOP Package
Table 3. Suggested Inductor Values
Table 4. Suggested Components
3/ 5
0 (5V)
0 (5V)
1 (3.3V)
1 (3.3V)
ILIM
0 (0.5A)
1 (0.8A)
0 (0.5A)
1 (0.8A)
INDUCTOR VALUE
(μH)
10 to 22
10
10
4.7 to 10
INDUCTORS
L1
10μH
Sumida
CD43-100 (1.04A, 0.182 ? )
CD54-100 (1.44A, 0.100 ? )
CDRH73-100 (1.68A, 0.072 ? )
Coilcraft
DT1608C-103 (0.7A, 0.095 ? )
CAPACITORS
Capacitor Selection
AVX
The equivalent series resistance (ESR) of both bypass
and filter capacitors affects efficiency and output rip-
ple. Output voltage ripple is the product of peak induc-
tor current and filter capacitor ESR. Use low-ESR
capacitors for best performance, or connect two or
more filter capacitors in parallel.
A 100μF, 16V, input bypass capacitor (C1) with low
ESR reduces peak battery currents and reflected noise
due to inductor current ripple. Smaller ceramic capaci-
tors may also be used for light loads or in applications
that can tolerate higher input ripple.
A 100μF, 16V, surface-mount (SMT) tantalum PS filter
capacitor (C2) with 0.1 ? ESR typically exhibits 20mV
Tantalum
DIODES
Schottky
TPSE Series
Sprague
593D or 595D Series
Motorola
MBRS130LT3 (1.0A, 30V)
MBR0520LT3 (0.5A, 20V)
International Rectifier
10BQ40 (1.0A, 40V)
1N5817 Equivalent
output ripple (at OUT) when stepping up from 2V to 5V
at 100mA load. Smaller capacitors (down to 10μF with
Table 5. Component Suppliers
higher ESR) are acceptable for light loads or in applica-
SUPPLIER
PHONE
FAX
tions that can tolerate higher output ripple.
Only 4.7μF is needed at OUT (C4) to maintain linear
regulator stability. During boost operation, this capaci-
tor reduces output voltage spikes from the step-up con-
verter by forming an R-C lowpass filter along with the
P-channel MOSFET on-resistance. Output ripple can be
further reduced by increasing C4.
See Tables 4 and 5 for a list of suggested capacitors
and suppliers.
Diode Selection
The MAX1672’s high switching frequency demands a
AVX
Coilcraft
International
Rectifier
Motorola
Sanyo
Sprague
Sumida
(803) 946-0690
(847) 639-6400
(310) 322-3331
(602) 303-5454
(619) 661-6835
(603) 224-1961
(847) 956-0666
(803) 626-3123
(847) 639-1469
(310) 322-3332
(602) 994-6430
(619) 661-1055
(603) 224-1430
(847) 956-0702
high-speed rectifier. Schottky diodes, such as the
1N5817 or MBRS130T3, are recommended. Make sure
the diode’s current rating exceeds the maximum load
current. See Tables 4 and 5 for a list of suggested
diodes and suppliers.
_______________________________________________________________________________________
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