參數(shù)資料
型號(hào)： MAX1712
廠(chǎng)商： Maxim Integrated Products, Inc.
英文描述： High-Speed, Digitally Adjusted Step-Down Controllers for Notebook CPUs
中文描述： 高速、數(shù)字可調(diào)、降壓型控制器，用于筆記本電腦
文件頁(yè)數(shù)： 10/28頁(yè)
文件大?。?/td> 437K
代理商： MAX1712
M
rent-mode PWMs while also avoiding the problems
caused by widely varying switching frequencies in con-
ventional constant-on-time and constant-off-time PWM
schemes.
+5V Bias Supply (V
CC
and V
DD
)
The MAX1710/MAX1711/MAX1712 require an external
+5V bias supply in addition to the battery. Typically, this
+5V bias supply is the notebook’s 95% efficient 5V sys-
tem supply. Keeping the bias supply external to the IC
improves efficiency and eliminates the cost associated
with the +5V linear regulator that would otherwise be
needed to supply the PWM circuit and gate drivers. If
stand-alone capability is needed, the +5V supply can be
generated with an external linear regulator such as the
MAX1615.
The battery and +5V bias inputs can be tied together if
the input source is a fixed 4.5V to 5.5V supply. If the +5V
bias supply is powered up prior to the battery supply, the
enable signal (
SHDN
) must be delayed until the battery
voltage is present in order to ensure startup. The +5V
bias supply must provide V
CC
and gate-drive power, so
the maximum current drawn is:
High-Speed, Digitally Adjusted
Step-Down Controllers for Notebook CPUs
10
______________________________________________________________________________________
V
CC
V
BATT
4.5V TO 28V
+5V
BIAS SUPPLY
C2
3 x 470
μ
F
KEMET T510
PANASONIC
ETQP6F2R0HFA
L1
2
μ
H
POWER-GOOD
INDICATOR
*MAX1710 ONLY
**MAX1711/MAX1712 ONLY
V
OUT
1.25V TO 2V AT 7A (MAX1710)
0.925V TO 2V AT 7A (MAX1711)
1.1V TO 1.85V AT 7A (MAX1712)
D3
(OPTIONAL OVP
REVERSE-POLARITY
CLAMP)
SHDN
V+
22
1
2
21
20
19
18
17
24
23
13
14
3
4
11
R4
1k
12
7
15
D2
CMPSH-3
C6
1
μ
F
C7
0.1
μ
F
C4
1
μ
F
C3
470pF
TO V
CC
Q1
D1
R2
100k
Q2
C5
1
μ
F
R1
20
C1 3 x 10
μ
F/30V
SKIP
D0
D1
D2
DAC
INPUTS
ON/OFF
CONTROL
LOW-NOISE
CONTROL
DL
LX
BST
DH
PGND
FB
FBS
GNDS
Q1 = IRF7807
Q2 = IRF7805
D1, D3 = MBRS130T3 (OPTIONAL)
C1 = SANYO OS-CON (30SC10M)
PGOOD
V
DD
MAX1710
MAX1711
MAX1712
8
9
5
6
16
+5V
10
D3
16
D4**
TON
REF
CC
GND
R3
(OPTIONAL)
ILIM
OVP*
Figure 1. Standard Application Circuit
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX17120ETJ+ 功能描述:LCD 驅(qū)動(dòng)器 Triple Scan Driver for TFT LCD RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
MAX17120ETJ+T 功能描述:LCD 驅(qū)動(dòng)器 Triple Scan Driver for TFT LCD RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
MAX17120EVKIT+ 功能描述:電源管理IC開(kāi)發(fā)工具 MAX17120 Eval Kit RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
MAX17121ETG+ 功能描述:LCD 驅(qū)動(dòng)器 Dual Scan Driver for TFT LCD RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
MAX17121ETG+T 功能描述:LCD 驅(qū)動(dòng)器 Dual Scan Driver for TFT LCD RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時(shí)鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
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