參數(shù)資料
型號(hào)： MAX1761EEE
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Replaced by TMS320VC5506 : Digital Signal Processor 100-LQFP
中文描述： SWITCHING CONTROLLER, 428 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 0.150 INCH, 0.025 INCH PITCH, QSOP-16
文件頁(yè)數(shù)： 10/23頁(yè)
文件大小： 473K
代理商： MAX1761EEE
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(guān)PDF資料
PDF描述
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
MAX1765EEE 800mA, Low-Noise, Step-Up DC-DC Converter with 500mA Linear Regulator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1761EEE+ 功能描述:DC/DC 開(kāi)關(guān)控制器 Dual Buck Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)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(fēng)格: 封裝 / 箱體:CPAK
MAX1761EEE+T 功能描述:DC/DC 開(kāi)關(guān)控制器 Dual Buck Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)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(fēng)格: 封裝 / 箱體:CPAK
MAX1761EEE-T 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)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(fēng)格: 封裝 / 箱體:CPAK
MAX1761EVKIT 功能描述:DC/DC 開(kāi)關(guān)控制器 Evaluation Kit for the MAX1761 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)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(fēng)格: 封裝 / 箱體:CPAK
MAX1762EUB 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)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(fēng)格: 封裝 / 箱體:CPAK
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