參數(shù)資料
型號(hào)： MAX1964
廠商： Maxim Integrated Products, Inc.
英文描述： Tracking/Sequencing Triple/Quintuple Power-Supply Controllers
中文描述： 三/五路電源控制器，提供跟蹤/排序功能
文件頁(yè)數(shù)： 1/30頁(yè)
文件大小： 475K
代理商： MAX1964
General Description
The MAX1964/MAX1965 power-supply controllers are
designed to address cost-sensitive applications
demanding voltage sequencing/tracking, such as
cable modem consumer premise equipment (CPE),
xDSL CPE, and set-top boxes. Operating off a low-cost,
unregulated DC supply (such as a wall adapter output),
the MAX1964 generates three positive outputs and the
MAX1965 generates four positive outputs and one neg-
ative output to provide an inexpensive system power
supply.
The MAX1964 includes a current-mode synchronous
step-down controller and two positive regulator gain
blocks. The MAX1965 has one additional positive gain
block and one negative regulator gain block. The main
synchronous step-down controller generates a high-
current output that is preset to 3.3V or adjustable from
1.236V to 0.75
V
IN
with an external resistive-divider.
The 200kHz operating frequency allows the use of low-
cost aluminum-electrolytic capacitors and low-cost
power magnetics. Additionally, the MAX1964/MAX1965
step-down controllers sense the voltage across the low-
side MOSFET’s on-resistance to efficiently provide the
current-limit signal, eliminating the need for costly cur-
rent-sense resistors.
The MAX1964/MAX1965 generate additional supply
rails at low cost. The positive regulator gain blocks use
an external PNP pass transistor to generate low voltage
rails directly from the main step-down converter (such
as 2.5V or 1.8V from the main 3.3V output) or higher
voltages using coupled windings from the step-down
converter (such as 5V, 12V, or 15V). The MAX1965’s
negative gain block uses an external NPN pass transis-
tor in conjunction with a coupled winding to generate
-5V, -12V, or -15V.
All output voltages are externally adjustable, providing
maximum flexibility. During startup, the MAX1964 fea-
tures voltage sequencing and the MAX1965 features
voltage tracking. Both controllers provide a power-
good output that monitors all of the output voltages.
Applications
xDSL, Cable, and ISDN Modems
Set-Top Boxes
Wireless Local Loop
Features
o
4.5V to 28V Input Voltage Range
o
Master DC-DC Step-Down Converter:
Preset 3.3V or Adjustable (1.236V to 0.75 x V
IN
)
Output Voltage
Fixed Frequency (200kHz) PWM Controller
No Current-Sense Resistor
Adjustable Current Limit
95% Efficient
Soft-Start
o
Two (MAX1964)/Four (MAX1965) Analog Gain
Blocks:
Positive Analog Blocks Drive Low-Cost PNP
Pass Transistors to Build Positive Linear
Regulators
Negative Analog Block (MAX1965) Drives a
Low-Cost NPN Pass Transistor to Build a
Negative Linear Regulator
o
Power-Good Indicator
o
Voltage Sequencing (MAX1964) or Tracking
(MAX1965)
Ordering Information
M
Tracking/Sequencing Triple/Quintuple
Power-Supply Controllers
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
TOP VIEW
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
POK
IN
VL
BST
DH
LX
DL
GND
ILIM
MAX1964
16-Pin QSOP
COMP
OUT
FB2
FB
B2
B3
FB3
IN
VL
BST
DH
LX
DL
GND
ILIM
POK
COMP
OUT
FB2
FB
B2
B3
FB3
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
12
11
9
10
FB5
B5
FB4
B4
MAX1965
20-Pin QSOP
Pin Configurations
19-2084; Rev 0; 7/01
Typical Operating Circuit appears at end of data sheet.
PA RT
TEMP.
RANGE
-40
°
C to +85
°
C
-40
°
C to +85
°
C
PIN-
PACKAGE
f
OSC
(kHz)
MAX1964
TEEE
MAX1965
TEEP
16 QSOP
20 QSOP
200
200
相關(guān)PDF資料
PDF描述
MAX1965 Tracking/Sequencing Triple/Quintuple Power-Supply Controllers
MAX1964TEEE Tracking/Sequencing Triple/Quintuple Power-Supply Controllers
MAX1965TEEP Tracking/Sequencing Triple/Quintuple Power-Supply Controllers
MAX1966 Low-Cost Voltage-Mode PWM Step-Down Controllers
MAX1967EUB Low-Cost Voltage-Mode PWM Step-Down Controllers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1964TEEE 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
MAX1964TEEE+ 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Track/Seq Trpl/Wuint Power-Supply Ctlr RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
MAX1964TEEE+T 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 Track/Seq Trpl/Wuint Power-Supply Ctlr RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
MAX1964TEEE-T 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
MAX1965TEEP 功能描述:電流和電力監(jiān)控器、調(diào)節(jié)器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Current Regulators 電源電壓-最大:48 V 電源電壓-最小:5.5 V 工作溫度范圍:- 40 C to + 150 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HPSO-8 封裝:Reel
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