參數(shù)資料
型號: DS232AS-N
廠商: DALLAS SEMICONDUCTOR
元件分類: Line Driver or Receiver
英文描述: LINE TRANSCEIVER, PDSO16
封裝: 0.300 INCH, SOIC-16
文件頁數(shù): 17/23頁
文件大?。?/td> 409K
代理商: DS232AS-N
MAX15026
Low-Cost, Small, 4.5V to 28V Wide Operating
Range, DC-DC Synchronous Buck Controller
3
Maxim Integrated
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ENABLE (EN)
EN Input High
VEN_H
VEN rising
1.14
1.20
1.26
V
EN Input Low
VEN_L
VEN falling
0.997
1.05
1.103
V
EN Input Leakage Current
ILEAK_EN
VEN = 5.5V
-1
+1
A
OSCILLATOR
Switching Frequency
fSW
RRT = 27k
540
600
660
kHz
1MHz Switching Frequency
RRT = 15.7k
0.9
1
1.1
MHz
2MHz Switching Frequency
RRT = 7.2k
1.8
2.0
2.4
MHz
Switching Frequency Adjustment
Range (Note 3)
200
2000
kHz
RT Voltage
VRT
1.19
1.205
1.22
V
PWM Ramp Peak-to-Peak
Amplitude
VRAMP
1.8
V
PWM Ramp Valley
VVALLEY
0.8
V
Minimum Controllable On-Time
65
100
ns
Maximum Duty Cycle
fSW = 600kHz
85
88
%
Minimum Low-Side On-Time
RRT = 15.7k
75
110
150
ns
OUTPUT DRIVERS/DRIVER SUPPLY (DRV)
DRV Undervoltage Lockout
VDRV_UVLO VDRV rising
4.0
4.2
4.4
V
DRV Undervoltage Lockout
Hysteresis
400
mV
Low, sinking 100mA, VBST = 5V
1
3
DH On-Resistance
High, sourcing 100mA, VBST = 5V
1.5
4.5
Low, sinking 100mA, VBST = 5.2V
1
3
DL On-Resistance
High, sourcing 100mA, VBST = 5.2V
1.5
4.5
Sinking
4
DH Peak Current
CLOAD = 10nF
Sourcing
3
A
Sinking
4
DL Peak Current
CLOAD = 10nF
Sourcing
3
A
DH/DL Break-Before-Make Time
DH at 1V (falling) to DL at 1V (rising)
10 (18, Note 5)
ns
DL/DH Break-Before-Make Time
DL at 1V (falling) to DH at 1V (rising)
10 (20, Note 6)
ns
SOFT-START
Soft-Start Duration
2048
Switching
Cycles
Reference Voltage Steps
64
Steps
CURRENT LIMIT/HICCUP
Current-Limit Threshold
Adjustment Range
Cycle-by-cycle valley current-limit
threshold adjustment range
valley limit = VLIM/10
30
300
mV
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 12V, RRT = 27k, RLIM = 30k, CVCC = 4.7F, CIN = 1F, TA = -40°C to +85°C (MAX15026B/CETD+, MAX15026BETD/V+),
TA = TJ = -40°C to +125°C (MAX15026B/C/DATD+), unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
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