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| 型号： | MAX17020ETJ+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/34页 |
| 文件大小： | 0K |
| 描述： | IC CTLR PWM DUAL STEP DN 32-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | Quick-PWM™ |
| 应用： | 电源 |
| 电流 - 电源： | 1mA |
| 电源电压： | 6 V ~ 24 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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Dual Quick-PWM Step-Down Controller
with Low-Power LDO, RTC Regulator
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, no load on LDO, RTC, OUT1, OUT2, and REF, V IN = 12V, V DD = V CC = V SECFB = 5V, V REFIN2 = 1.0V, BYP =
LDOREFIN = GND, ONLDO = IN, ON1 = ON2 = V CC , T A = 0°C to +85°C , unless otherwise noted. Typical values are at T A = +25°C.)
(Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
OUT2 FAULT DETECTION
Preset mode (REFIN2 = RTC or V CC ): with
respect to error-comparator threshold
13
16
19
%
OUT2 Overvoltage Trip
Threshold
V OVP(OUT2)
Dynamic transition,
SKIP = REF or V CC and OUT2 > REFIN2
V REF +
0.20
V
Tracking mode: with respect to REFIN2 voltage
Minimum overvoltage threshold
170
200
0.7
230
mV
V
OUT2 Overvoltage
Fault-Propagation Delay
t OVP
OUT2 forced 50mV above trip threshold
10
μs
OUT2 Undervoltage-Protection
Trip Threshold
OUT2 Overvoltage
Fault-Propagation Delay
OUT2 Output Undervoltage
Fault-Propagation Delay
Dynamic REFIN2 Transition
PGOOD Blanking Threshold
PGOOD2 Lower Trip Threshold
PGOOD2 Propagation Delay
PGOOD2 Output-Low Voltage
PGOOD2 Leakage Current
Preset mode: with respect to
V UVP(OUT2) error-comparator threshold
Tracking mode: with respect to REFIN2 voltage
t OVP
OUT2 forced 50mV above trip threshold
t UVP
OUT2 forced 50mV below trip threshold
Blanking initiated; REFIN2 deviation from the
internal target voltage (error-comparator
threshold); hysteresis = 5mV
Preset mode: with respect to error-comparator
threshold, falling edge, hysteresis = 1%
Tracking mode: with respect to REFIN2
voltage, falling edge, hysteresis = 12mV
OUT2 forced 50mV beyond PGOOD1 trip
t PGOOD2
threshold, falling edge
V OUT2 = V REFIN2 - 150mV (PGOOD2 low
impedance), I SINK = 4mA
OUT2 = REFIN2 (PGOOD2 high impedance),
I PGOOD2
PGOOD2 forced to 5.5V, T A = +25°C
65
-250
-19
-175
70
-300
10
10
±25
-16
-150
10
75
-350
-13
-125
0.3
1
%
mV
μs
μs
mV
%
mV
μs
V
μA
CURRENT LIMIT
ILIM_ Adjustment Range
ILIM_ Current
V ILIM
I ILIM
0.2
5
2.0
V
μA
Valley Current-Limit Threshold
(Adjustable)
V VALLEY
V AGND - V LX _
R ILIM _ = 100k
R ILIM _ = 200k
44
90
50
100
56
110
mV
R ILIM _ = 400k
180
200
220
Current-Limit Threshold
(Negative)
Ultrasonic Current-Limit Threshold
Current-Limit Threshold
(Zero Crossing)
V NEG
V NEG(US)
V ZX
With respect to valley current-limit threshold,
SKIP = V CC
V OUT1 = V OUT2 = V FB1 = 0.77V, V REFIN2 = 0.70V
V AGND - V LX _, SKIP = GND or OPEN/REF
-120
25
3
%
mV
mV
_______________________________________________________________________________________
5
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