Operating Temperature Range ........................... -40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................ -40°C to +150°C
Soldering Temperature (reflow) ....................................... +260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Information
µDFN
PACKAGE CODE
Outline Number
Land Pattern Number
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θ
JA
)
223.6°C/W
122°C/W
N60E1+1
21-100128
Refer to Application Note 1891
95.15°C/W
N/A
Junction to Case (θ
JC
)
PACKAGE CODE
Outline Number
Land Pattern Number
Thermal Resistance, Four-Layer Board:
Junction to Ambient (θ
JA
)
Junction to Case (θ
JC
)
21-0164
90-0004
L622+1C
WLP
For the latest package outline information and land patterns (footprints), go to
www.maximintegrated.com/packages.
Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board.
For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
www.maximintegrated.com
Maxim Integrated
│
2
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Electrical Characteristics
(V
IN
= V
EN
= 1.5V, V
OUT
= 3V
,
T
A
= -40°C to +85°C, typical values are at T
A
= +25°C, unless otherwise noted. (Note 1))
PARAMETER
Minimum Input Voltage
Input Voltage Range
Minimum Startup Input
Voltage
Output Voltage Range
Output Accuracy, LPM
Output Accuracy,
Ultra-Low-Power Mode
SYMBOL
V
IN_MIN
V
IN
V
IN_STARTUP
V
OUT
ACC
LPM
ACC
ULPM
CONDITIONS
Runs from output after startup, I
OUT
= 1mA
Guaranteed by LX Maximum On-Time
R
L
≥ 3kΩ, Typical Operating Circuit,
T
A
= 25°C ,
See R
SEL
Selection table.
For V
IN
< V
OUT
target. Note 2.
V
OUT
falling, when LX switching frequency
is > 1MHz. Note 3.
V
OUT
falling, when LX switching frequency
is > 1kHz. Note 4.
MAX17220/2/4
EN = open after startup.
MAX17221/3/5 EN = V
IN
. T
A
= 25°C.
Not switching, V
OUT
= 104%
of V
OUT
target.
MAX17220/2/4
EN = open after startup.
MAX17221/3/5 EN = V
IN
. T
A
= 85°C
Not switching, V
OUT
= 104%
of V
OUT
target.
T
A
= 25°C
MAX17220/2/4 EN = Open after startup.
MAX17221/3/5 EN = V
IN
. Not switching,
V
OUT
= 104% of V
OUT
target. Total current
includes IN, LX, and EN. T
A
= 25ºC.
MAX17220/2/3/4/5, R
L
= 3kΩ, V
OUT
= V
EN
= 0V.
MAX17221, R
L
= open,V
E N
= 0V,
T
A
= 25°C.
MAX17220/2/3/4/5, R
L
= 3kΩ. MAX17221,
R
L
= open, V
EN
= 0V, V
IN
= V
LX
= 3V.
Includes LX and IN leakage. T
A
= 25°C.
MAX17220
I
PEAK
DC
t
ON
t
OFF
Note 5
Note 6
Note 6
Note 6
V
OUT
= 1.8V
V
OUT
= 3V
V
OUT
= 1.8V
V
OUT
= 3V
MAX17221/2/3
MAX17224/5
180
0.4
0.8
70
280
270
90
80
1.8
-1.5
1
2.5
0.95
0.88
MIN
TYP
400
5.5
0.95
5
+1.5
4
MAX
UNITS
mV
V
V
V
%
%
300
600
nA
Quiescent Supply Current
Into OUT
I
Q_OUT
470
900
Quiescent Supply Current
Into IN
Total Quiescent Supply
Current into IN LX EN
I
Q_IN
0.1
nA
I
Q_IN_TOTAL
0.5
100
nA
Shutdown Current Into IN
Total Shutdown Current
into IN LX
Inductor Peak Current
Limit
LX Maximum Duty Cycle
LX Maximum On-Time
LX Minimum Off-Time
I
SD_IN
0.1
nA
I
SD_TOTAL
0.5
225
0.5
1
75
365
300
120
100
100
270
0.575
1.2
450
330
150
120
nA
mA
A
%
ns
ns
www.maximintegrated.com
Maxim Integrated
│
3
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Electrical Characteristics (continued)
(V
IN
= V
EN
= 1.5V, V
OUT
= 3V
,
T
A
= -40°C to +85°C, typical values are at T
A
= +25°C, unless otherwise noted. (Note 1))
PARAMETER
LX Leakage Current
SYMBOL
I
LX_LEAK
CONDITIONS
V
OUT
= V
EN
= 0V
V
LX
= 1.5V,
T
A
= 25°C
V
LX
= 5.5V,
T
A
= 85°C.
MAX17220
N-Channel On-Resistance
R
DS(ON)
V
OUT
= 3.3V
MAX17221/2/3
MAX17224/5
MAX17220
P-Channel On-Resistance
Synchronous Rectifier
Zero-Crossing As Percent
of Peak Current Limit
Enable Voltage Threshold
Enable Input Leakage
Enable Input Impedance
Required Select Resistor
Accuracy
Select Resistor Detection
Time
R
SEL
t
RSEL
R
DS(ON)
V
OUT
= 3.3V
MAX17221/2/3
MAX17224/5
I
ZX
V
IL
V
IH
I
EN_LK
V
OUT
= 3.3V, Note 7
When LX switching stops, EN falling
EN rising
MAX17221/3/5, V
EN
= 5.5V, T
A
= 25°C
MAX17220/2/4, V
EN
= 0V, T
A
= 25°C,
MAX17220/2/4
Use the nearest ±1% resistor from R
SEL
Selection Table
V
OUT
= 1.8V, C
RSEL
< 2pF, Note 8
-1
360
600
2.5
300
MIN
TYP
0.3
nA
30
124
62
31
300
150
75
5
500
600
0.1
0.1
100
200
1
1320
850
270
135
70
600
300
150
7.5
%
mV
nA
kΩ
%
μs
mΩ
mΩ
MAX
UNITS
Note 1:
Limits are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed through
correlation using statistical quality control (SQC) methods.
Note 2:
Guaranteed by the Required Select Resistor Accuracy parameter.
Note 3:
Output Accuracy, Low Power mode is the regulation accuracy window expected when I
OUT
> I
OUT_TRANSITION
. See
PFM
Control Scheme
and V
OUT
ERROR vs I
LOAD
TOC for more details. This accuracy does not include load, line, or ripple.
Note 4:
Output Accuracy, Ultra-Low Power mode is the regulation accuracy window expected when I
OUT
< I
OUT_TRANSITION
. See
PFM Control Scheme
and V
OUT
ERROR vs. I
LOAD
TOC for more details. This accuracy does not include load, line, or ripple.
Note 5:
The maximum current limit parameter accounts for 5% of overcurrent due to propagation delays. This is a static measurement.
See I
LIM
vs. V
IN
TOC.
Note 6:
Guaranteed by measuring LX frequency and duty cycle
Note 7:
This is a static measurement.
Note 8:
This is the time required to determine RSEL value. This time adds to the startup time. See
Output Voltage Selection.
www.maximintegrated.com
Maxim Integrated
│
4
MAX17220–MAX17225
400mV to 5.5V Input, nanoPower Synchronous
Boost Converter with True Shutdown
Typical Operating Characteristics
(MAX17222ELT+, IN = 1.5V, OUT = 3V, L = 2.2μH Coilcraft XFL4020-222, C
据外媒报道，萨里大学（University of Surrey）的研究人员开发出一种无需依赖GPS即可在人口密集的城市地区精确定位设备位置的人工智能系统。该系统可将定位误差从734米缩小到22米以内，这对于自动驾驶汽车和救援车辆等技术的发展意义重大。 图片来源： 萨里大学 在发表于《IEEE Robotics and Automation Letters》的论文中，研究人员介绍了PEn...[详细]
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