MAX38640/1/2/3/A/B
Tiny 1.8V - 5.5V Input, 330nA I , 700mA
Q
nanoPower Buck Converter
Electrical Characteristics
(V = 3.3V, V
IN
= 1.8V, T = -40°C to +85°C, C = 4.7µF, C
= 10µF, unless otherwise specified. (Note 1))
OUT
OUT
A
IN
PARAMETER
Shutdown Current
Input Voltage Range
SYMBOL
CONDITIONS
= 0V, T = 25°C
MIN
TYP
MAX
0.1
UNITS
I
V
EN
0.005
µA
V
IN_SD
A
V
Guaranteed by Output Accuracy
1.8
5.5
IN_RANGE
V
R
> 50kΩ rising
V
IN
1.75
50
1.8
V
UVLO
UVLO
SEL
(MAX3864xA),
MAX3864xB
Hysteresis
rising
mV
Input Undervoltage
Lockout
V
V
IN
2.6
2.7
V
mV
V
R
SEL
< 50kΩ
(MAX3864xA)
Hysteresis
125
Output Voltage Range
Output Accuracy
V
Guaranteed by Output Accuracy
0.5
5
OUT_RANGE
OUT falling, when LX begins switching
V
above 1MHz, V
5.5V (Note 2)
= 0.7V to 3.3V, V =
IN
-1.75
+1.75
%
%
OUT_ACC
OUT
V
OUT
= 1.8V, V = 2.0V to 5.5V, I
=
OUT
IN
DC Line Regulation
V
LREG
I
Q_IN
±1.5
330
10mA to 160mA
= V , not switching V = 106% of
OUT
V
EN
IN
Quiescent Supply
Current Into IN
target voltage, V
= 25°C
= 2.5V, T
660
nA
OUT TARGET
A
V
= V , not switching V
= 106% of
OUT
EN
IN
Quiescent Supply
Current Into OUT
I
target voltage, V
= 2.5V,
10
nA
Q_OUT
OUT TARGET
T
A
= 25°C
Soft-Start Slew Rate
LX Leakage Current
dV
/dt
V
= 1.8V, no load
OUT
6.5
2
mV/µs
nA
OUT
I
V
LX
= V = 5.5V, T = 25°C
100
1200
600
LEAK_LX
IN
A
MAX38643
800
400
225
1000
500
250
95
Inductor Peak Current
Limit
I
MAX38641/MAX38642
MAX38640
mA
mΩ
PEAK_LX
300
MAX38643
150
MAX38641/
MAX38642
High-Side R
R
V
IN
= 3.3V
= 3.3V
170
320
DSON
DS_H
MAX38640
MAX38643
320
50
600
90
MAX38641/
MAX38642
Low-Side R
R
V
V
80
150
5
160
290
mΩ
DSON
DS_L
IN
MAX38640
Zero-Crossing
Threshold
I
= 1.2V, percent of I
PEAK_LX
%
ZX_LX
OUT
Enable Input Leakage
I
V
V
V
= 5.5V, T = +25°C
0.1
0.8
0.7
100
1.2
nA
LEAK_EN
EN
EN
EN
A
V
EN_R
rising
falling
Enable Voltage
Threshold
V
V
EN_F
0.4
50
Active Discharge
Resistance ( MAX3860/
MAX3861/MAX3863
Only)
V
EN
= 0V,
R
85
200
Ω
OUT_DIS
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