參數(shù)資料
型號： MAX887
廠商： Maxim Integrated Products, Inc.
元件分類： DC/DC變換器
英文描述： 100% Duty Cycle, Low-Noise, Step-Down, PWM DC-DC Converter
中文描述： 100%占空比、低噪聲、降壓型、PWM DC-DC轉(zhuǎn)換器
文件頁數(shù)： 2/12頁
文件大?。?/td> 146K
代理商： MAX887
M
100% Duty Cyc le, Low-Noise,
S tep-Down, PWM DC-DC Converter
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
REF, FB, SYNC, VL to GND..................................... -0.3V to +6V
V+ to GND............................................................. -0.3V to +12V
SHDN
, LX to GND ....................................... -0.3V to (V+ + 0.3V)
PGND to GND ...................................................... -0.3V to +0.3V
Continuous Power Dissipation (T
A
= +70°C)
SO (derate 9.09mW/°C above +70°C) .........................471mW
ELECTRICAL CHARACTERISTICS
(V+ = +7V, PGND = GND = 0V,
SHDN
= V+,
(T
A
= 0°C to T
MAX
)
, unless otherwise noted.)
SYMBOL
PARAMETER
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Operating Temperature Ranges
MAX887HC/D.......................................................0°C to +70°C
MAX887HESA...................................................-40°C to +85°C
Storage Temperature Range ........................... -65°C to +165°C
Lead Temperature (soldering, 10sec) ............................ +300°C
SYNC = GND or 3V
I
OUT
= 0mA, SYNC = GND
V+ rising
I
OUT
= 0mA, SYNC = 3.0V
V+ falling
V+ = floating, LX = 5V,
SHDN
= GND
V+ = 12V, LX = GND to 12V
I
LX
= ±100mA
SYNC = 3.0V
FB = 1.30V
SYNC = 3.0V, PWM duty cycle = 50%
SHDN
= GND
Circuit of Figure 2
I
OUT
= 0mA to 500mA
V
IN
= 4V to 11V, PWM mode
SYNC = 3.0V, FB = 1.18V
CONDITIONS
V
V
2.4
V
IH,
SHDN
V
IL,
SHDN
I
IN-,
SHDN
C
IN,
SHDN
V
L
V
REF
SHDN
Input High Voltage
SHDN
Input Low Voltage
SHDN
Input Current, Sinking
SHDN
Input Capacitance
VL Output Voltage
REF Output Voltage
μA
±1
I
IN, SYNC
SYNC Input Current
V
0.5
V
IL, SYNC
SYNC Input Low Voltage
V
2.5
V
IH, SYNC
SYNC Input High Voltage
V
3.1
3.5
V
+, START
Startup Voltage
V
3.0
3.3
V
+, UVLO
Undervoltage Lockout
μA
1.0
20
I
LXLKGR
LX Reverse Leakage Current,
Regulator Off
μA
-10
1.0
10
I
LXLKG
LX Leakage Current
0.6
R
ON, LX
LX On-Resistance
A
0.75
1.0
1.40
I
LIM+
High-Side Current Limit
kHz
260
300
340
f
OSC
PWM Switching Frequency
%
100
PWM, DUTY
PWM Maximum Duty Cycle
mA
0.2
0.5
I
V+, PFM
Quiescent Supply Current
(PFM Mode)
mA
2.7
4.0
I
V+, PWM
V
3.5
11.0
V+
Supply Range
Quiescent Supply Current
(PWM Mode)
ns
500
SYNC, PW
SYNC Pulse Width High or Low
kHz
25
440
f
SYNC
SYNC Frequency
μA
±0.10
I
FB
FB Input Current
V
1.225
1.250
1.275
V
FB
PWM FB Feedback Threshold
μA
V
2.5
5
I
V+, SHDN
V
OUT, RANGE
Shutdown Supply Current
Output Voltage Range
Load Regulation
Line Regulation
1.25
10.50
%/mA
%/V
0.005
0.2
UNITS
MIN
TYP
MAX
0.8
±1
10
SHDN
= GND or V+
(Note 1)
I
VL
= 0mA to 1mA
0μA to 30μA
μA
pF
V
V
3.3
1.25
Note 1:
Guaranteed by design and not production tested.
相關(guān)PDF資料
PDF描述
MAX887HESA 100% Duty Cycle, Low-Noise, Step-Down, PWM DC-DC Converter
MAX8881EUT33-T 12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8880 12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
MAX8880EUT-T RES 100-OHM 5% 0.063W 200PPM THK-FILM SMD-0402 TR-7-PA2MM UNMARKED
MAX8881 12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX8873REUK 制造商:Maxim Integrated Products 功能描述:- Rail/Tube 制造商:Rochester Electronics LLC 功能描述:
MAX8873REUK+T 功能描述:低壓差穩(wěn)壓器 - LDO 120mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
MAX8873REUK-T 功能描述:低壓差穩(wěn)壓器 - LDO 120mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20
MAX8873SEUK 制造商:Maxim Integrated Products 功能描述:- Cut Tape Product 制造商:Rochester Electronics LLC 功能描述:
MAX8873SEUK+ 制造商:Maxim Integrated Products 功能描述:LDO REG 1.25V TO 6.5V/2.84V 0.12A 5PIN SOT-23 - Rail/Tube
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*