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参数资料
| 型号： | MAX1854 |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | High-Speed, Adjustable, Synchronous Step-Down Controllers with Integrated Voltage Positioning |
| 中文描述： | 高速、数字可调、同步降压型控制器，集成电压定位电路 |
| 文件页数： | 5/33页 |
| 文件大小： | 840K |
| 代理商： | MAX1854 |
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M
High-Speed, Adjustable, Synchronous Step-Down
Controllers with Integrated Voltage Positioning
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = +15V, V
CC
= V
DD
= 5V,
SKIP
= V
CC
, VPS = PGND,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted.) (Note 6)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
PWM CONTROLLER
Battery voltage, V+
V
CC
, V
DD
2
28
5.5
Input Voltage Range
4.5
V
DAC codes from
1.35V to 2.0V
-1.6
1.6
DC Output Voltage Accuracy
(Notes 2, 3)
V+ = 4.5V to 28V,
VPS = PGND
DAC codes from
0.6V to 1.3V
-2
2
%
FB Input Bias Current
VPS Input Bias Current
VPS Gain
CS Input Bias Current
ILIM Input Leakage Current
I
FB
I
VPS
A
VPS
I
CS
I
ILIM
FB = 0.6V to 2.0V
V
VPS
=
±
40mV
V
VPS
= 0 or -40mV, gain from VPS to FB
0 to 28V
V
ILIM
= 0 or 5.0V
-0.2
-1
0.153
-1
0.2
1
0.197
1
100
300
375
520
740
500
μ
A
μ
A
%/mV
μ
A
nA
TON = GND
TON = REF
TON = open
TON = V
CC
205
280
425
615
On-Time (Note 4)
t
ON
V+ = 11.0V,
V
FB
= 1.5V
ns
Minimum Off-Time (Note 4)
BIAS AND REFERENCE
t
OFF( M N)
ns
Quiescent Supply Current (V
CC
)
I
CC
Measured at V
CC
, FB forced above the
regulation point
950
μ
A
Quiescent Supply Current (V
DD
)
I
DD
Measured at V
DD
, FB forced above the
regulation point
5
μ
A
Quiescent Supply Current (V+)
Shutdown Supply Current (V
CC
)
Shutdown Supply Current (V
DD
)
Shutdown Supply Current (V+)
Reference Voltage
Reference Load Regulation
REF Sink Current
FAULT PROTECTION
I+
40
5
5
5
2.02
0.01
μ
A
μ
A
μ
A
μ
A
V
V
μ
A
SHDN
= GND
SHDN
= GND
S HDN
= GN D V + = 28V V
C C
= V
D D
= 0 or 5V
V
CC
= 4.5V to 5.5V, no external REF load
I
REF
= 0 to 50
μ
A
REF in regulation
V
REF
1.98
I
REF
10
MAX1716
MAX1855
1.8
1.97
2.0
2.03
V
Output Overvoltage Fault
Threshold (Note 5)
Measured at FB
Output Undervoltage Fault
Threshold (Foldback)
35
45
%
Output Undervoltage Fault
Blanking Time (Foldback)
From
SHDN
signal going high
10
30
ms
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1854EEG | 功能描述:DC/DC 开关控制器 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1854EEG/GG8 | 功能描述:DC/DC 开关控制器 High-Speed Adjustable Synchronous Step-Down Controllers with Integrated Voltage Positioning RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| MAX1854EEG+ | 制造商:Maxim Integrated Products 功能描述:HIGH-SPEED,DIGITALLY ADJUSTABLE SYNCHRONOUS STEPDOWN CONTROL - Rail/Tube |
| MAX1854EEG+T | 制造商: 功能描述: 制造商:undefined 功能描述: |
| MAX1854EEGT | 制造商: 功能描述: |
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