MAX1776 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
生产厂家
MAX1776 Datasheet PDF : 13 Pages
| |||
24V, 600mA Internal Switch, 100% Duty Cycle,
Step-Down Converter
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VIN = +12V, SHDN = IN, TA = 0°C to +85°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
Dropout Voltage
Line Regulation
VDROPOUT IOUT = 525mA, ILIM = ILIM2 = IN
VIN = 8V/24V, 200Ω load
Load Regulation
No load/full load
Digital Input Level
SHDN, ILIM2
Low
High
2.4
Digital Input Leakage Current
V SHDN, VILIM, VILIM2 = 0 or 24V, VIN = 24V
-1
Low
ILIM Input Level
High
2.2
Thermal Shutdown
10°C hysteresis
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, VIN = +12V, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
Input Voltage Range
VIN
4.5
Input Supply Current
IIN
No load
Input Supply Current in Dropout
Input Shutdown Current
IIN(DROP) No load
SHDN = GND
Input Undervoltage Lockout
Threshold
VUVLO
VIN rising
VIN falling
3.6
3.5
Output Voltage (Preset Mode)
VOUT FB = GND
4.75
Feedback Set Voltage
(Adjustable Mode)
VFB
1.2
OUT Bias Current
VOUT = 5.5V
1.65
OUT Pin Maximum Voltage
FB Bias Current
IFB
VFB = 1.3V
-25
FB Dual Mode Threshold Low
45
LX Switch Minimum Off-Time
tOFF(MIN)
0.22
LX Switch Maximum On-Time
tON(MAX) VFB = 1.3V
7.5
ILIM = ILIM2 = GND
VIN = 6V
ILIM = GND, ILIM2 = IN
ILIM = IN, ILIM2 = GND
LX Switch On-Resistance
RLX
ILIM = ILIM2 = IN
ILIM = ILIM2 = GND
VIN = 4.5V
ILIM = GND, ILIM2 = IN
ILIM = IN, ILIM2 = GND
ILIM = ILIM2 = IN
ILIM = ILIM2 = GND
100
ILIM = GND, ILIM2 = IN
200
LX Current Limit
ILX(PEAK) ILIM = IN, ILIM2 = GND
400
ILIM = ILIM2 = IN
800
TYP
0.2
0.1
0.9
160
MAX
0.8
UNITS
V
%/V
%
V
+1
µA
0.05
V
°C
MAX
24
28
70
7
4.4
4.3
5.25
UNITS
V
µA
µA
µA
V
V
1.3
V
6.25
µA
5.5
V
+25
nA
155
mV
0.64
µs
12.5
µs
3.2
1.6
0.8
0.8
Ω
3.8
1.9
0.95
0.95
200
400
mA
800
1600
_______________________________________________________________________________________ 3
Share Link: 