Electrical Characteristics (continued)
(V
SUP
= V
SUPSW
= 14V, VEN = 14V, L1 = 2.2µH, C
IN
= 4.7µF, C
OUT
= 44µF, C
BIAS
= 2.2µF, C
BST
= 0.1µF, R
FOSC
= 12kΩ, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Load Regulation V
FB
= V
BIAS
, 30mA < I
LOAD
< 3A 0.5 %
Line Regulation V
FB
= V
BIAS
, 6V < V
SUPSW
< 36V 0.02 %/V
BST Input Current
I
BST_ON
High-side MOSFET on,
V
BST
- V
LX
= 5V
1.5 mA
I
BST_OFF
High-side MOSFET off,
V
BST
- V
LX
= 5V
1.5 µA
LX Current Limit I
LX
MAX20003:
MAX20003CATPA/V+,
MAX20003CATPB/V+,
3.75 5 6.25
A
MAX20002, MAX20002C 2.5 3.33 4.16
MAX20003CATPC/V+,
MAX20003CATPD/V+
5
LX Rise Time V
OUT
= 5V, 3.3V 4 ns
Spread Spectrum Spread spectrum enabled
FOSC
±3%
High-Side Switch On-
Resistance
R
ON_H
I
LX
= 0.5A, V
BIAS
= 5V 60 140 mΩ
High-Side Switch Leakage
Current
High-side MOSFET off, V
SUP
= 36V,
V
LX
= 0V, T
A
= +25°C
1 5 µA
Low-Side Switch On-
Resistance
R
ON_L
I
LX
= 0.5A, V
BIAS
= 5V 35 70 mΩ
Low-Side Switch Leakage
Current
Low-side MOSFET off, V
SUP
= 36V,
V
LX
= 36V, T
A
= +25°C
1 5 µA
FB Input Current I
FB
T
A
= +25°C 20 100 nA
FB Regulation Voltage V
FB
FB connected to an external resistive
divider, 6V < V
SUPSW
< 36V
0.99 1 1.01
V
FB connected to an external resistive
divider, 6V < V
SUPSW
< 36V
(MAX20002C, MAX20003C)
0.985 1 1.015
FB Line Regulation ∆V
LINE
6V < V
SUPSW
< 36V 0.02 %/V
Transconductance (from FB to
COMP)
g
M
V
FB
= 1V, V
BIAS
= 5V 700 µS
Minimum On-Time t
ON_MIN
80 ns
Maximum Duty Cycle DC
MAX
98 99 %
Oscillator Frequency
R
FOSC
= 73.2kΩ 400 kHz
R
FOSC
= 12kΩ 2.0 2.2 2.4 MHz
SYNC, EN, AND SPS LOGIC THRESHOLDS
External Input Clock Acquisition
Time
t
FSYNC
1 Cycle
External Input Clock Frequency R
FOSC
= 12kΩ (Note 4) 1.8 2.6 MHz
External Input Clock High
Threshold
V
FSYNC_HI
V
FSYNC
rising 1.4 V
www.maximintegrated.com
Maxim Integrated
│
4
MAX20002/MAX20003 36V, 220kHz to 2.2MHz, 2A/3A Fully
Integrated Step-Down Converters
with 15μA Operating Current
