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参数资料
| 型号： | MAX1875EEG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/21页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 24-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 660kHz |
| 占空比： | 90% |
| 电源电压： | 4.75 V ~ 23 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 包装： | 管件 |
Dual 180° Out-of-Phase PWM Step-
Down Controllers with POR
ABSOLUTE MAXIMUM RATINGS
V+ to GND ..............................................................-0.3V to +25V
PGND to GND .......................................................-0.3V to +0.3V
V L to GND ..................-0.3V to the lower of +6V and (V+ + 0.3V)
BST1, BST2 to GND ...............................................-0.3V to +30V
LX1 to BST1..............................................................-6V to +0.3V
LX2 to BST2..............................................................-6V to +0.3V
DH1 to LX1 ..............................................-0.3V to (V BST1 + 0.3V)
DH2 to LX2 ..............................................-0.3V to (V BST2 + 0.3V)
DL1, DL2 to PGND........................................-0.3V to (V L + 0.3V)
FB1, FB2, RST , SYNC, EN to GND...........................-0.3V to +6V
VL to GND Short Circuit .............................................Continuous
REF to GND Short Circuit ...........................................Continuous
Continuous Power Dissipation (T A = +70 ° C)
24-Pin QSOP (derate 9.4mW/ ° C above +70 ° C)...........762mW
Operating Temperature Range ...........................-40 ° C to +85 ° C
Junction Temperature ......................................................+150 ° C
Storage Temperature Range .............................-65 ° C to +150 ° C
Lead Temperature (soldering, 10s) .................................+300 ° C
CKO, REF, OSC, ILIM1, ILIM2,
COMP1, COMP2 to GND ..........................-0.3V to (V L + 0.3V)
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.
ELECTRICAL CHARACTERISTICS
(V+ = 12V, EN = ILIM_ = V L , SYNC = GND, I VL = 0mA, PGND = GND, C REF = 0.22μF, C VL = 4.7μF (ceramic), R OSC = 60k ? ,
compensation components for COMP_ are from Figure 1, T A = -40 ° C to +85 ° C (Note 1), unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
GENERAL
V+ Operating Range
V+ Operating Supply Current
(Note 2)
V L = V+ (Note 2)
V L unloaded, no MOSFETs connected
4.75
4.75
3.5
23
5.5
6
V
mA
V+ Standby Supply Current
EN = LX_ = FB_ = 0V
R OSC = 60k ?
0.3
0.6
mA
Thermal Shutdown
Rising temperature, typical hysteresis = 10 ° C
160
° C
ILIM_ = V L
75
100
125
mV
Current-Limit Threshold
PGND - LX_
R ILIM_ = 100k ?
R ILIM_ = 600k ?
32
225
50
300
62
375
mV
mV
V L REGULATOR
Output Voltage
V L Undervoltage Lockout
Trip Level
5.5V < V+ < 23V, 1mA < I LOAD < 50mA
4.75
4.4
5
4.55
5.25
4.7
V
V
REFERENCE
Output Voltage
Reference Load Regulation
I REF = 0μA
0μA < I REF < 50μA
1.98
0
2.00
4
2.02
10
V
mV
SOFT-START
Digital Ramp Period
Soft-Start Steps
Internal 6-bit DAC for one converter to ramp from 0V to
full scale (Note 3)
1024
64
DC-DC
Clocks
Steps
FREQUENCY
Low End of Range
High End of Range
DH_ Minimum Off-Time
R OSC = 60k ?
R OSC = 10k ?
R OSC = 10k ?
0 ° C to +85 ° C
-40 ° C to +85 ° C
84
80
540
100
100
600
250
115
120
660
303
kHz
kHz
ns
2
_______________________________________________________________________________________
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