MAX1953 データシートの表示（PDF） - Maxim Integrated
部品番号
コンポーネント説明
一致するリスト
MAX1953 Datasheet PDF : 22 Pages
| |||
Low-Cost, High-Frequency, Current-Mode PWM
Buck Controller
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 5V, VBST - VLX = 5V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
ILIM Input Impedance
Current-Limit Threshold
OSCILLATOR
Switching Frequency
Maximum Duty Cycle
Minimum Duty Cycle
SOFT-START
Soft-Start Period
FET DRIVERS
DH On-Resistance, High State
DH On-Resistance, Low State
DL On-Resistance, High State
DL On-Resistance, Low State
CONDITIONS
MAX1953 only
VPGND - VLX, ILIM = GND (MAX1953 only)
VPGND - VLX, ILIM = open (MAX1953 only)
VPGND - VLX, ILIM = IN (MAX1953 only)
VPGND – VLX (MAX1954/MAX1957 only)
MAX1953
MAX1954/MAX1957
Measured at DH
MAX1953, measured at DH
MAX1954/MAX1957, measured at DH
MIN TYP MAX
50
125 200
85
105 125
190
210
235
290
320
350
190
210
235
0.8
1
1.2
240
300
360
86
89
96
15
18
4.5
5.5
MAX1953
4
MAX1954/MAX1957
3.4
2
3
1.5
3
2
3
0.8
2
LX, BST Leakage Current
VBST = 10.5V, VLX = VIN = 5.5V,
20
MAX1953/MAX1957
LX, BST, HSD Leakage Current
THERMAL PROTECTION
Thermal Shutdown
Thermal Shutdown Hysteresis
SHUTDOWN CONTROL
COMP Logic Level Low
COMP Logic Level High
COMP Pullup Current
VBST = 18.7V, VLX = 13.2V, VIN = 5.5V
VHSD = 13.2V (MAX1954 only)
Rising temperature
3V < VIN < 5.5V
3V < VIN < 5.5V
30
160
15
0.25
0.8
100
Note 1: Specifications to -40°C are guaranteed by design and not production tested.
Note 2: HSD and IN are externally connected for applications where VHSD < 5.5V.
UNITS
kΩ
mV
MHz
kHz
%
%
ms
Ω
Ω
Ω
Ω
µA
µA
°C
°C
V
V
µA
_______________________________________________________________________________________ 3
Share Link: 