參數(shù)資料
型號(hào)： MAX1636
廠商： Maxim Integrated Products, Inc.
英文描述： Low-Voltage, Precision Step-Down Controller for Portable CPU Power
中文描述： 低電壓、高精度降壓型控制器，用于便攜式CPU電源
文件頁(yè)數(shù)： 8/24頁(yè)
文件大?。?/td> 219K
代理商： MAX1636
M
Low-Voltage, Prec ision S tep-Down
Controller for Portable CPU Power
8
_______________________________________________________________________________________
______________________________________________________________Pin Desc ription
NAME
FUNCTION
1
CSH
Current-Sense Input, High Side
2
CSL
Current-Sense Input, Low Side. Also serves as a feedback input in fixed output modes.
PIN
3
RESET
Timed Reset Output. Low for at least 100ms after output voltage is valid, then goes high impedance
(open drain).
4
SHDN
Shutdown Control Input. Puts chip in shutdown or standby mode, depending on OVP (Table 5).
8
SYNC
Oscillator Frequency Select and Synchronization Input. Tie to V
CC
for 300kHz operation; tie to GND for
200kHz operation.
7
REF
1.100V Reference Output. Capable of sourcing 50μA for external loads; bypass with a 0.22μF
(min) capacitor.
6
CC
Compensation pin. Connect a small capacitor to GND to set the integration time constant.
5
OVP
Overvoltage Protection Enable/Disable. Tie to GND to disable OVP; tie to V
CC
to enable OVP.
13
V+
5V VL Linear-Regulator Input. The VL linear regulator automatically shuts off if V+ is left open or shorted to
V
L
. Bypass V+ to GND with a 0.1μF capacitor close to the IC.
12
V
CC
Main Supply Voltage Input. Powers the PWM controller, logic, and reference. Input range is +3.15V to
+5.5V.
11
FB
Feedback Input. Tie to GND for fixed 3.3V output; tie to V
CC
for fixed 2.5V output; tie to resistor divider for
adjustable mode.
9, 10
GND
Analog Ground
15
DL
Low-Side Gate-Driver Output
14
VL
5V Linear-Regulator Output. Powers the DL low-side gate driver. Bypass with a 2.2μF (min) capacitor.
20
SKIP
Low-Noise Mode Control. Forces fixed-frequency PWM operation when high.
19
LX
Inductor Connection
18
DH
High-Side Gate-Driver Output
17
BST
Boost-Capacitor Connection
16
PGND
Power Ground
______S tandard Applic ation Circ uit
The basic MAX1636 buck converter (Figure 1) is easily
adapted to meet a wide range of applications with
inputs up to 30V by substituting components from
Table 1. These circuits represent a good set of trade-
offs between cost, size, and efficiency, while staying
within the worst-case specification limits for stress-
related parameters, such as capacitor ripple current.
Do not change the circuits’ switching frequency without
first recalculating component values (particularly induc-
tance value at maximum battery voltage). Adding a
Schottky rectifier across the synchronous rectifier
improves circuit efficiency by approximately 1%. This
rectifier is otherwise not needed because the MOSFET
required typically incorporates a high-speed silicon
diode from drain to source. Use a Schottky rectifier
rated at a DC current equal to at least one-third of the
load current.
相關(guān)PDF資料
PDF描述
MAX1636EAP Low-Voltage, Precision Step-Down Controller for Portable CPU Power
MAX1637 Miniature, Low-Voltage, Precision Step-Down Controller
MAX1637EEE Miniature, Low-Voltage, Precision Step-Down Controller
MAX1638 High-Speed Step-Down Controller with Synchronous Rectification for CPU Power
MAX1638EAG High-Speed Step-Down Controller with Synchronous Rectification for CPU Power
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1636CPUEVKIT 制造商:Maxim Integrated Products 功能描述:LOW VOLTAGE, PRECISION STEP DOWN CONTROLLER F - Bulk
MAX1636EAP 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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
MAX1636EAP+ 功能描述:DC/DC 開關(guān)控制器 Precision Step-Down for Portable CPU Pwr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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
MAX1636EAP+T 功能描述:DC/DC 開關(guān)控制器 Precision Step-Down for Portable CPU Pwr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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
MAX1636EAP-T 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(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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