Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX8562 User Manual
Page 3
MAX8560/MAX8561/MAX8562
4MHz, 500mA Synchronous Step-Down
DC-DC Converters in SOT and TDFN
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 3.6V, SHDN = IN, T
A
= -40°C to +85°C, typical values are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ODO Pullup to IN (MAX8562 Only)
5
10
20
k
Ω
V
IN
= 5.5V, ODO = IN, T
A
= +25°C
0.01
0.1
Open-Drain Output Leakage
I
OHLEAK
V
IN
= 5.5V, ODO = IN, T
A
= +85°C
0.1
µA
I
LIMP
PFET switch
600
990
1500
Current Limit
I
LIMN
NFET rectifier
490
680
900
mA
R
ONP
PFET switch, I
LX
= -40mA
0.8
1.5
On-Resistance
R
ONN
NFET rectifier, I
LX
= +40mA
0.4
0.82
Ω
Rectifier-Off Current Threshold
I
LXOFF
0
30
60
mA
V
IN
= 5.5V, LX = GND to IN, ODO = IN,
T
A
= +25
°C, SHDN = GND
0.1
1
LX Leakage Current
I
LXLKG
V
IN
= 5.5V, LX = GND to IN, ODO = IN,
T
A
= +85
°C, SHDN = GND
1
µA
t
ON(MIN)
107
Minimum On- and Off-Times
t
OFF(MIN)
95
ns
Thermal Shutdown
+160
°C
Thermal-Shutdown Hysteresis
20
°C
Typical Operating Characteristics
(V
IN
= 3.6V, V
OUT
= 1.2V, L = 1µH (LQH32C-IRO), C
OUT
= 2.2µF, T
A
= +25°C, unless otherwise noted.)
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 2.5V)
MAX8560 toc01
LOAD CURRENT (mA)
EFFICIENCY (%)
100
10
1
50
60
70
80
90
100
40
0.1
1000
4.7
µH
2.2
µH
1
µH
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 1.8V)
MAX8560 toc02
LOAD CURRENT (mA)
EFFICIENCY (%)
100
10
1
50
60
70
80
90
100
40
0.1
1000
4.7
µH
2.2
µH
1
µH
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 1.5V)
MAX8560 toc03
LOAD CURRENT (mA)
EFFICIENCY (%)
100
10
1
50
60
70
80
90
100
40
0.1
1000
4.7
µH
2.2
µH
1
µH