參數(shù)資料
型號： MAX1761
廠商： Maxim Integrated Products, Inc.
英文描述： Small, Dual, High-Efficiency Buck Controller for Notebooks
中文描述： 小型、雙路、高效率buck控制器，用于筆記本電腦
文件頁數(shù)： 10/23頁
文件大小： 473K
代理商： MAX1761
M
Small, Dual, High-Efficiency
Buck Controller for Notebooks
10
______________________________________________________________________________________
comparator has 40mV hysteresis to prevent startup
oscillations on slowly rising input voltages.
If VL is not driven externally, then V+ should be at least
5V to ensure proper operation. If V+ is running from a
5V (±10%) supply, V+ should be externally connected
to VL. Overdriving the VL regulator with an external 5V
supply also increases the MAX1761
’
s efficiency.
Voltage Reference (REF)
The internal 2V reference is accurate to ±1% (max)
over temperature and can supply a 50μA load current.
Bypass REF to GND with a 0.1μF capacitor when REF
is unloaded. Use a 0.22μF capacitor when applying an
external load.
Free-Running Constant-On-Time PWM
Controller with Input Feed-Forward
The Quick-PWM control architecture is a constant-on-
time, current-mode type with voltage feed-forward
(Figure 3). This architecture relies on the output ripple
voltage to provide the PWM ramp signal. Thus, the out-
put filter capacitor
’
s ESR acts as a feedback resistor.
The control algorithm is simple: the high-side switch on-
time is determined solely by a one-shot whose period is
inversely proportional to input voltage and directly pro-
portional to output voltage (see the
On-Time One-Shot
section). Another one-shot sets a minimum off-time
(400ns typical). The on-time one-shot is triggered if the
error comparator is low, the low-side switch current is
below the current-limit threshold, and the minimum off-
time one-shot has timed out.
Table 1. Component Selection for Standard Applications
COMPONENT
Input Range
Frequency
2.5V AT 2.0A
5V to 18V
350kHz
2.5V AT 3.5A
5V to 18V
350kHz
1.8V AT 2.0A
5V to 18V
250kHz
3.3V AT 2A
5V to 18V
350kHz
Complementary
P- and N-Channel
MOSFETs
Fairchild FDS8958A
Siliconix IRF7319
Fairchild FDS8958A
Fairchild FDS8958A
Inductor
7
μ
H
Sumida CDRH104-
7R0NC
3.5
μ
H
Sumida CDRH127-
3R5NC
7
μ
H
Sumida CDRH104-
7R0NC
10
μ
H
Sumida CDRH104-
100NC
Input Capacitor
10
μ
F, 25V
Taiyo Yuden
TMK432BJ106KM
2 x 10
μ
F, 25V
Taiyo Yuden
TMK432BJ106KM
10
μ
F, 25V
Taiyo Yuden
TMK432BJ106KM
10
μ
F, 25V
Taiyo Yuden
TMK432BJ106KM
Output Capacitor
330
μ
F, 10V
Kemet
T510X 337K101
2 x 330
μ
F, 10V
Kemet
T510X 337K010
330
μ
F, 10V
Kemet
T510X 337K010
330
μ
F, 10V
Kemet
T510X 337K010
R
1
= Short
R
2
= Open
R
1
= 1k
R
2
= 1k
R
3
= Short
R
4
= Open
R
1
= Short
R
2
= Open
C urr ent- S ense
Feed b ack Resi stor s
Table 2. Component Suppliers
SUPPLIER
PHONE
WEB
Fairchild
Semiconductor
408-822-2181
www.fairchildsemi.com
Kemet
Panasonic
408-986-0424
847-468-5624
www.kemet.com
ww w.p anasonic. com
Rohm
760-929-2100
www.rohmelectronics.
com
Sanyo
Siliconix
Sumida
Taiyo Yuden
619-661-6835
408-988-8000
847-956-0666
408-573-4150
www.secc.co.jp
www.vishay.com
www.sumida.com
www.t-yuden.com
相關PDF資料
PDF描述
MAX1761EEE Replaced by TMS320VC5506 : Digital Signal Processor 100-LQFP
MAX1763 1.5A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1763EEE 1.5A, Low-Noise, 1MHz, Step-Up DC-DC Converter
MAX1763EUE Replaced by TMS320C6410 : Digital Signal Processors 68-PLCC -40 to 85
MAX1765 Replaced by TMS320C6410 : Digital Signal Processors 68-PLCC -40 to 85
相關代理商/技術參數(shù)
參數(shù)描述
MAX17611GTL+ 制造商:Maxim Integrated Products 功能描述:IMVP7 CPU AND GRAPHICS CONTROLLER - Rail/Tube
MAX17611GTL+T 制造商:Maxim Integrated Products 功能描述:IMVP7 CPU AND GRAPHICS CONTROLLER - Tape and Reel
MAX1761EEE 功能描述:DC/DC 開關控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
MAX1761EEE+ 功能描述:DC/DC 開關控制器 Dual Buck Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
MAX1761EEE+T 功能描述:DC/DC 開關控制器 Dual Buck Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK
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