1- to 3-Cell, High-Current, Low-Noise,
Step-Up DC-DC Converters with Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(V
OUT
= V
POUT
= V
LBP
= 3.6V, CLK/SEL = FB = LBN = LBO = ONA =
ONB
= TRACK = GND, REF = open (bypassed with 0.22µF),
LX = open,
T
A
= -40°C to +85°C,
unless otherwise noted, Note 4.)
PARAMETER
LINEAR REGULATOR
FBLDO Regulation Voltage
FBLDO Input Current
Short-Circuit Current Limit
Dropout Resistance
LOW-BATTERY COMPARATOR
LBN, LBP Offset
LBN, LBP Common-Mode
Input Range
LBO High Leakage
CONTROL INPUTS
Input Low Level
Input High Level
Internal Oscillator Frequency
External Oscillator
Synchronization Range
Note 1:
Note 2:
Note 3:
Note 4:
1.2V < V
OUT
< 5.5V, ONA,
ONB
(Note 2)
V
OUT
= 2.5V, CLK/SEL, TRACK
1.2V < V
OUT
< 5.5V, ONA,
ONB
(Note 2)
V
OUT
= 5.5V, CLK/SEL, TRACK
CLK/SEL = OUT
0.85V
OUT
0.85V
OUT
260
200
340
400
0.15V
OUT
0.15V
OUT
V
V
kHz
kHz
LBP falling
LBN = 0.5V and 1.5V (at least one input must
be within this range)
LBO = OUT = 5V
-5
0.5
5
1.5
1
mV
V
µA
FBLDO = LDO, I
LOAD
= 1mA
V
FBLDO
= 1.5V
FBLDO = LDO = GND
V
FBLDO
= 1V, I
LDO
= 200mA
220
1.233
0.01
1.268
50
600
1.2
V
nA
mA
Ω
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX1705/MAX1706
Once the output is in regulation, the MAX1705/MAX1706 operate down to a 0.7V input voltage.
The device is in start-up mode when V
OUT
is below this value (see
Low-Voltage Start-Up Oscillator
section).
ONA and
ONB
inputs have a hysteresis of approximately 0.15V
OUT
.
Specifications to -40°C to are guaranteed by design, not production tested.
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
