Step-Up Converter
for Handheld Applications
ELECTRICAL CHARACTERISTICS (continued)
(V = 2.6V, T = -40NC to +85NC, unless otherwise noted. Typical values are T = +25NC.) (Note 3)
IN
A
A
PARAMETER
CONDITIONS
, conditions emulating 0 <
ATMRT
MIN
TYP
MAX
UNITS
2.5V < V < V
IN
I
< 1A, C
= 22FF, L = 1FH,
3.00
3.45
OUT
OUT
V
_
= 3.3V
OUT TARGET
2.5V < V < V
, conditions emulating 0 <
ATMRT
IN
I
V
< 1A, C
= 22FF, L = 1FH,
= 3.5V
3.15
3.35
3.95
4.50
3.65
3.85
4.35
OUT
OUT
_
OUT TARGET
2.5V < V < V
I
V
, conditions emulating 0 <
ATMRT
= 22FF, L = 1FH,
= 3.7V
IN
Steady-State Output Voltage
(Notes 5, 6)
< 1A, C
V
OUT
OUT
_
OUT TARGET
2.5V < V < V
I
V
, conditions emulating 0 <
ATMRT
IN
< 600mA, C
= 22FF, L = 1FH,
OUT
OUT
_
= 4.25V
OUT TARGET
2.5V < V < V
I
V
, conditions emulating 0 <
ATMRT
IN
< 500mA, C
= 22FF, L = 1FH,
5.10
5
OUT
OUT
_
= 5V
OUT TARGET
T
T
= +25NC
= +85NC
0.1
0.2
A
A
LX_ Leakage Current
V
= 0V, 4.8V
FA
FA
LX
EN = high, I
low, not switching)
= 0A, 1FH inductor (TREN is
OUT
Skip-Mode Supply Current
45
pMOS Turn-Off Current (Zero-Cross Current)
LX_ nMOS Current Limit
10
2.6
83
mA
A
3.2
Maximum Duty Cycle
%
Minimum Duty Cycle
0
%
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
V
OUT
= 3.3V
= 3.5V
= 3.7V
= 4.25V
= 5V
120
115
110
100
91
pMOS On-Resistance
nMOS On-Resistance
mI
= 3.3V
= 3.5V
= 3.7V
= 4.25V
= 5V
65
63
60
mI
FF
55
51
Minimum Output Capacitance for Stable
Operation (Actual)
8
V
V
V
V
V
= 3.3V
= 3.5V
= 3.7V
= 4.25V
= 5V
70
55
45
30
20
OUT
OUT
OUT
OUT
OUT
0 < I
during startup
< 0.3A
OUT
Maximum Output Capacitance (Actual)
FF
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
