MAX1774EEI 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
比赛名单
MAX1774EEI Datasheet PDF : 21 Pages
| |||
Dual, High-Efficiency, Step-Down
Converter with Backup Battery Switchover
ELECTRICAL CHARACTERISTICS (continued)
(Figure 1, VIN = VINS = +12V, VINC = VCS- = VCS+ = +3.3V, VCORE = +1.8V, TA = 0°C to +85°C, unless otherwise noted. Typical values are
at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Maximum Duty Cycle
100
%
Minimum On-Time
Minimum Off-Time
200
400
650
ns
200
400
650
ns
CORE REGULATOR
Input Voltage Range
INC Undervoltage Lockout
Core Output Voltage Adjust Range
VINC
VINC rising
VINC falling
2.6
5.5
V
2.40 2.47 2.55
V
2.30 2.37 2.45
1.0
5.0
V
Maximum Core Load Current
VCORE = 1.8V (Note 1)
1
1.5
A
FBC Regulation Threshold
VFBC VINC = +2.5 to +5.5V, IOUTC = 0 to 200mA
0.97
1.0
1.03
V
FBC Input Current
IFBC
VFBC = +1.3V
-0.1
0.1
µA
Dropout Voltage
IOUTC = 400mA
0.1 0.25
V
LXC Leakage Current
ILXC
VINC = +5.5V, VLXC = 0 to +5.5V
-10
10
µA
LXC P-Channel, N-Channel On-
Resistance
0.25
0.5
Ω
LXC P-Channel Current Limit
LXC P-Channel Minimum Current
LXC N-Channel Valley Current
ICLC
1200 1800 3000 mA
100
250 400
mA
900 1400 2400 mA
LXC N-Channel Zero-Crossing
Current
40
110
170
mA
LXC Dead Time
Max Duty Cycle
50
ns
100
%
Minimum On-Time
Minimum Off-Time
170
400
690
ns
170
400
690
ns
BACKUP REGULATOR
Backup Battery Input Voltage
LXB N-Channel On-Resistance
LXB Current Limit
VBBATT
VCS- = +3.3V, ILXB = 50mA
0.9
5.5
V
1.9
3.5
Ω
200
350 600
mA
LXB Leakage Current
BIN Leakage Current
VLXB = +5.5V, VFBM = +1.3V
IBIN
VBIN = +5.5V, CS- = BKOFF =
SHDNC = SHDNM = GND
1
µA
1
µA
BIN, CS- Switch Resistance
VCS- = +3.3V, BKOFF = GND,
SHDNM = CVL
7.5
15
Ω
BIN Switch Zero-Crossing
Threshold
VBIN = +2.5V, BKOFF = SHDNC =
SHDNM = CVL
17
35
mV
LXB Maximum On-Time
Zero Crossing Detector Timeout
2.8
5.6
9.2
µs
40
µs
_______________________________________________________________________________________ 3
Share Link: 