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)： 10/24頁(yè)
文件大?。?/td> 219K
代理商： MAX1636
Matsuo
(1) 512-992-3377
(1) 714-960-6492
(512) 992-7900
(714) 969-2491
_______________Detailed Desc ription
The MAX1636 is a BiCMOS, switch-mode, power-sup-
ply controller designed primarily for buck-topology reg-
ulators in battery-powered applications where high
efficiency and low quiescent supply current are critical.
Light-load efficiency is enhanced by automatic Idle
Mode operation, a variable-frequency, pulse-skipping
mode that reduces transition and gate-charge losses.
The step-down, power-switching circuit consists of two
N-channel MOSFETs, a rectifier, and an LC output filter.
The output voltage is the average AC voltage at the
switching node, which is regulated by changing the
duty cycle of the MOSFET switches. The gate-drive sig-
nal to the N-channel high-side MOSFET, which must
exceed the battery voltage, is provided by a flying-
capacitor boost circuit that uses a 100nF capacitor
between BST and LX. The MAX1636 contains 10 major
circuit blocks (Figure 2).
The pulse-width-modulation (PWM) controller consists
of a Dual Mode feedback network and multiplexer, a
multi-input PWM comparator, high-side and low-side
gate drivers, and logic. The MAX1636 contains fault-
protection circuits that monitor the PWM output for
undervoltage and overvoltage. Bias generator blocks
include the 5V (VL) linear regulator and the 1.1V preci-
sion reference. The PWM uses a 200kHz/300kHz syn-
chronizable oscillator. The circuit blocks are powered
from an internal IC power rail that receives power from
either VL or V
CC
. The synchronous-switch gate driver is
powered directly from VL, while the high-side-switch
gate driver is powered indirectly from VL via an external
diode-capacitor boost circuit.
M
Low-Voltage, Prec ision S tep-Down
Controller for Portable CPU Power
10
______________________________________________________________________________________
(619) 661-6835
(408) 988-8000
(81) 7-2070-1174
(1) 408-970-3950
Sanyo
Siliconix
Tokin
(408) 432-8020
(847) 390-4373
(1) 408-434-0375
(1) 847-390-4428
TDK
Sprague
Sumida
(847) 956-0666
(81) 3-3607-5144
(603) 224-1961
(714) 373-7939
(1) 714-373-7183
Panasonic
(1) 603-224-1430
(602) 303-5454
(1) 602-994-6430
Motorola
COMPANY
Central
Semiconductor
Fairchild
(408) 721-2181
(1) 408-721-1635
(512) 992-7900
(1) 512-992-3377
IRC
Dale
(310) 322-3331
(1) 310-322-3332
International
Rectifier (IR)
(605) 668-4131
(847) 639-6400
(561) 241-7876
(1) 847-639-1469
(1) 561-241-9339
Coilcraft
Coiltronics
(1) 605-665-1627
USA PHONE
(516) 435-1110
(803) 946-0690
FACTORY FAX
(COUNTRY CODE)
(1) 516-435-1824
(1) 803-626-3123
AVX
Table 2. Component Suppliers
Figure 1. Standard Application Circuit
MAX1636
V+
0.1
μ
F
POWER INPUT
0.1
μ
F
1
μ
F
1nF
C1
Q1
CMPSH-3
Q2
C2
L1
*
R1
R2
R3
OUTPUT
4.7
μ
F
SHDN
*SEE RECTIFIER CLAMP DIODE SECTION
SKIP
DL
PGND
LX
DH
BST
OVP
SYNC
VL
V
CC
CSH
CSL
FB
10k
V
CC
CC
GND
GND
RESET
REF
(847) 696-2000
(1) 847-696-9278
Marcon/United
IRC
Dual Mode is a trademark of Maxim Integrated Products.
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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(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
MAX1636EAP+ 功能描述:DC/DC 開(kāi)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(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
MAX1636EAP+T 功能描述:DC/DC 開(kāi)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(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
MAX1636EAP-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
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