MAX8562 查看數據表（PDF） - Maxim Integrated
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MAX8562 Datasheet PDF : 12 Pages
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4MHz, 500mA Synchronous Step-Down
DC-DC Converters in Thin SOT and TDFN
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 3.6V, SHDN = IN, TA = -40°C to +85°C, typical values are at TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
ODO Pullup to IN (MAX8562 Only)
Open-Drain Output Leakage
Current Limit
On-Resistance
Rectifier-Off Current Threshold
LX Leakage Current
Minimum On- and Off-Times
Thermal Shutdown
Thermal-Shutdown Hysteresis
SYMBOL
IOHLEAK
ILIMP
ILIMN
RONP
RONN
ILXOFF
ILXLKG
tON(MIN)
tOFF(MIN)
CONDITIONS
VIN = 5.5V, ODO = IN, TA = +25°C
VIN = 5.5V, ODO = IN, TA = +85°C
PFET switch
NFET rectifier
PFET switch, ILX = -40mA
NFET rectifier, ILX = +40mA
VIN = 5.5V, LX = GND to IN, ODO = IN,
TA = +25°C, SHDN = GND
VIN = 5.5V, LX = GND to IN, ODO = IN,
TA = +85°C, SHDN = GND
MIN TYP MAX
5
10
20
0.01 0.1
0.1
600
990 1500
490
680
900
0.8
1.5
0.4 0.82
0
30
60
0.1
1
1
107
95
+160
20
UNITS
kΩ
µA
mA
Ω
mA
µA
ns
°C
°C
Typical Operating Characteristics
(VIN = 3.6V, VOUT = 1.2V, L = 1µH (LQH32CN1R0M53), COUT = 2.2µF, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(VOUT = 2.5V)
100
4.7µH
90
2.2µH
80
1µH
70
EFFICIENCY vs. LOAD CURRENT
(VOUT = 1.8V)
100
90
4.7µH
80
2.2µH
1µH
70
EFFICIENCY vs. LOAD CURRENT
(VOUT = 1.5V)
100
90
4.7µH
80
2.2µH
1µH
70
60
60
60
50
50
50
40
0.1
1
10
100
1000
LOAD CURRENT (mA)
40
0.1
1
10
100
1000
LOAD CURRENT (mA)
40
0.1
1
10
100
1000
LOAD CURRENT (mA)
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