MAX1830 Maxim, MAX1830 Datasheet - Page 4

• Manufacturer Part Number: MAX1830
• Description: 3A / 1MHz / Low-Voltage / Step-Down Regulators with Synchronous Rectification and Internal Switches
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(V
3A, 1MHz, Low-Voltage, Step-Down Regulators with
Synchronous Rectification and Internal Switches
4
Note 2: Not production tested.
Note 3: Soft-start time is measured with respect to the number of cycles on LX.
Note 4: This is a metal migration limit. Maximum output current may be limited by thermal capability to a lower value than this.
Note 5: Specifications from 0°C to -40°C are guaranteed by design, not production tested.
(Circuit of Figure 1, T
Adjustable Output Voltage Range
Reference Voltage
Current-Limit Threshold
Idle Mode Current Threshold
PMOS Switch On-Resistance
NMOS Switch On-Resistance
No-Load Supply Current
FB Input Bias Current
Off-Time
IN
100
95
90
85
80
75
70
65
60
55
50
_______________________________________________________________________________________
= V
0.001
CC
EFFICIENCY vs. OUTPUT CURRENT
V
R
OUT
TOFF
PARAMETER
= +3.3V, FBSEL = GND, T
= 3.3V
= 39kΩ
0.01
(V
IN
OUTPUT CURRENT (A)
= 5.0V, L = 1.5µH)
V
R
A
OUT
TOFF
0.1
= +25°C, unless otherwise noted.)
= 1.5V
= 82kΩ
V
R
OUT
TOFF
1
= 1.8V
= 75kΩ
SYMBOL
I
A
IN
R
R
I
V
LIMIT
ON
t
= -40°C to +85°C, unless otherwise noted.) (Note 5)
ON
10
I
OFF
I
REF
+ I
FB
IM
,
,
CC
N
P
100
95
90
85
80
75
70
65
60
55
50
V
= GND
I
I
V
V
R
LX
LX
0.001
CC
FB
FB
TOFF
= 0.5A
= 0.5A
EFFICIENCY vs. OUTPUT CURRENT
= 1.2V
= 1.2V
= V
= 110kΩ
V
R
IN
OUT
TOFF
0.01
(V
= +3V to +5.5V, I
V
R
= 1.8V
IN
= 51kΩ
OUTPUT CURRENT (A)
OUT
TOFF
= 3.3V, L = 1.5µH)
= 2.5V
= 39kΩ
CONDITIONS
0.1
V
R
Typical Operating Characteristics
OUT
TOFF
= 1.5V
= 62kΩ
LOAD
1
V
V
V
V
IN
IN
IN
IN
= 4.5V
= +3V
= 4.5V
= +3V
= 0, FBSEL
10
100
95
90
85
80
75
70
65
60
55
50
0.001
1.078
V
EFFICIENCY vs. OUTPUT CURRENT
0.14
MIN
3.9
0.8
REF
0
0.01
V
V
R
L = 5.2µH
OUT
IN
TOFF
OUTPUT CURRENT (A)
= 5.0V
(f
= 1.8V
PWM
TYP
= 220kΩ
= 300kHz)
0.1
V
V
R
L = 2.5µH
OUT
IN
TOFF
= 3.3V
= 1.8V
1.122
MAX
= 160kΩ
110
100
750
360
V
5.4
1.0
1.2
90
95
IN
1
UNITS
mΩ
µA
nA
µs
V
V
A
A
10