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參數(shù)資料
| 型號： | MAX1999 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| 中文描述： | 高效率、四路輸出、主電源控制器，用于筆記本電腦 |
| 文件頁數(shù)： | 13/32頁 |
| 文件大?。?/td> | 497K |
| 代理商： | MAX1999 |
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M
High-Effic ienc y, Quad Output, Main Power-
S upply Controllers for Notebook Computers
______________________________________________________________________________________
13
Pin Desc ription (c ontinued)
PIN
MAX1777
MAX1977
MAX1999
NAME
FUNCTION
13
—
CS5
5V SMPS Current-Sense Input. Connect CS5 to a current-sensing resistor from the source of
the synchronous rectifier to GND. The voltage at ILIM5 determines the current-limit threshold
(see the
Current-Limit Circuit
section).
Frequency Select Input. Connect to V
CC
for 200kHz/300kHz operation and to GND for
400kHz/500kHz operation (5V/3.3V SMPS switching frequencies, respectively).
Boost Flying Capacitor Connection for 5V SMPS. Connect to an external capacitor and diode
according to the
Typical Application Circuits
(Figure 1 and Figure 2). See the
MOSFET Gate
Drivers (DH_, DL_)
section.
Inductor Connection for 5V SMPS. LX5 is the internal lower supply rail for the DH5 high-side
gate driver. LX5 is the current-sense input for the 5V SMPS (MAX1999 only).
High-Side MOSFET Floating Gate-Driver Output for 5V SMPS. DH5 swings from LX5 to BST5.
Analog Supply Voltage Input for PWM Core. Connect V
CC
to the system supply voltage with a
series 50
resistor. Bypass to GND with a 1μF ceramic capacitor.
5V Linear-Regulator Output. LDO5 is the gate-driver supply for the external MOSFETs. LDO5
can provide a total of 100mA, including MOSFET gate-drive requirements and external loads.
The internal load depends on the choice of MOSFET and switching frequency (see the
Reference and Linear Regulators (REF, LDO5, and LDO3)
section). If OUT5 is greater than the
LDO5 bootstrap switch threshold, the LDO5 regulator shuts down and the LDO5 pin connects
to OUT5 through a 1.4
switch. Bypass LDO5 with a minimum of 4.7μF. Use an additional 1μF
per 5mA of load.
5V SMPS Synchronous Rectifier Gate-Drive Output. DL5 swings between GND and LDO5.
Power-Supply Input. V+ powers the LDO5/LDO3 linear regulators and is also used for the
Quick-PWM on-time one-shot circuits. Connect V+ to the battery input through a 4
resistor
and bypass with a 4.7μF capacitor.
5V SMPS Output Voltage-Sense Input. Connect to the 5V SMPS output. OUT5 is an input to the
Quick-PWM on-time one-shot circuit. It also serves as the 5V feedback input in fixed-voltage
mode. If OUT5 is greater than the LDO5 bootstrap-switch threshold, the LDO5 linear regulator
shuts down and LDO5 connects to OUT5 through a 1.4
switch.
3.3V SMPS Output Voltage-Sense Input. Connect to the 3.3V SMPS output. OUT3 is an input to
the Quick-PWM on-time one-shot circuit. It also serves as the 3V feedback input in fixed-
voltage mode. If OUT3 is greater than the LDO3 bootstrap-switch threshold, the LDO3 linear
regulator shuts down and LDO3 connects to OUT3 through a 1.5
switch.
Analog and Power Ground
3.3V SMPS Synchronous-Rectifier Gate-Drive Output. DL3 swings between GND and LDO5.
3.3V Linear-Regulator Output. LDO3 can provide a total of 100mA to external loads. If OUT3 is
greater than the LDO3 bootstrap-switch threshold, the LDO3 regulator shuts down and the
LDO3 pin connects to OUT3 through a 1.5
switch. Bypass LDO3 with a minimum of 4.7μF.
Use an additional 1μF per 5mA of load.
High-Side MOSFET Floating Gate-Driver Output for 3.3V SMPS. DH3 swings from LX3 to BST3.
Inductor Connection for 3.3V SMPS. LX3 is the current-sense input for the 3.3V SMPS
(MAX1999 only).
Boost Flying Capacitor Connection for 3.3V SMPS. Connect to an external capacitor and diode
according to the
Typical Application Circuits
(Figure 1 and Figure 2). See the
MOSFET Gate
Drivers (DH_, DL_)
section.
—
13
TON
14
14
BST5
15
15
LX5
16
16
DH5
17
17
V
CC
18
18
LDO5
19
19
DL5
20
20
V+
21
21
OUT5
22
22
OUT3
23
24
23
24
GND
DL3
25
25
LDO3
26
26
DH3
27
27
LX3
28
28
BST3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1977EEI | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| MAX1999EEI | High-Efficiency, Quad Output, Main Power- Supply Controllers for Notebook Computers |
| MAX1778 | 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 85 |
| MAX1880 | Quad-Output TFT LCD DC-DC Converters with Buffer |
| MAX1881 | Quad-Output TFT LCD DC-DC Converters with Buffer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX19993ETX+ | 功能描述:上下轉(zhuǎn)換器 High-Gain 1.2GHz to 1.7GHz Downconv RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| MAX19993ETX+T | 功能描述:上下轉(zhuǎn)換器 High-Gain 1.2GHz to 1.7GHz Downconv RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| MAX19993EVKIT# | 功能描述:射頻開發(fā)工具 High-Gain 1.2GHz to 1.7GHz Downconv RoHS:否 制造商:Taiyo Yuden 產(chǎn)品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
| MAX19994AETX+ | 功能描述:上下轉(zhuǎn)換器 High-Gain 1.2GHz to 2GHz Downconv RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| MAX19994AETX+T | 功能描述:上下轉(zhuǎn)換器 High-Gain 1.2GHz to 2GHz Downconv RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
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