Rainbow Electronics MAX1706 - Manual (Page 3)

MAX1705/MAX1706
1- to 3-Cell, High-Current, Low-Noise,
Step-Up DC-DC Converters with Linear Regulator
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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 = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)
f = 300kHz
V
OUT
= 5.5V, CLK/SEL, TRACK
V LBO = V OUT = 5V
I SINK = 1mA, V OUT = 2.5V, LBP = GND,
LBN = OUT
1.2V < V OUT < 5.5V, ONA, ONB (Note 3)
V OUT = 2.5V, CLK/SEL, TRACK
V
LBN
= V LBP = 1V
V LBN = 0.5V and 1.5V (at least one input must
be within this range)
Hysteresis approximately 10°C
LBP falling
1.2V < V OUT < 5.5V, ONA, ONB (Note 3)
LBP rising
CONDITIONS
µA 1
Input Leakage Current
(CLK/SEL, ONA, ONB, TRACK)
0.8V OUT
V
0.8V OUT
Input High Level
0.2V OUT
V
0.2V OUT
Input Low Level
dB 38 AC Power-Supply Rejection
µA 1 LBO High Leakage
V 0.4 LBO Output Low Voltage
nA 0.01 50 LBN, LBP Input Current
V 0.5 1.5
LBN, LBP Common-Mode
Input Range
°C 155 Thermal Shutdown
mV -5 5 LBN, LBP Offset
mV 16 LBN, LBP Hysteresis
UNITS MIN TYP MAX SYMBOL PARAMETER
mA 20 70 120
P-Channel Synchronous-
Rectifier Turn-Off Current
V
LX
= 0V, V ONB = V OUT = 5.5V µA 0.1 20 POUT Leakage Current
CLK/SEL = GND
CLK/SEL = GND
250 435 550
CLK/SEL = OUT
mA
1000 1280 1550
I LIM
N-Channel MOSFET
Current Limit 550 750 950
MAX1705
MAX1705
MAX1706
MAX1706 250 435 550
FBLDO = LDO, I LOAD = 1mA V 1.238 1.250 1.262 FBLDO Regulation Voltage
V
FBLDO
= 1.5V nA 0.01 50 FBLDO Input Current
FBLDO = GND mA 220 300 500 Short-Circuit Current Limit
V
FBLDO
= 1V, I LDO = 200mA
Ω
0.5 1.2 Dropout Resistance
10µA < I LDO < 200mA, FBLDO = LDO % 0.4 1.2 Load Regulation
2.5V < V OUT < 5.5V, FBLDO = LDO,
I LDO = 1mA
% 0.1 0.5 Line Regulation
P-channel, I LX = 100mA 0.27 0.50
N-channel, I LX = 100mA
Ω
0.23 0.45
Switch On-Resistance 0.16 0.28
CLK/SEL = GND
CLK/SEL = OUT
V LX = 0V, V ONB = V OUT = 5.5V µA 0.1 20 LX Leakage Current
V 1.25 5.0 LDO Adjust Range
CONTROL INPUTS
LOW-BATTERY COMPARATOR
LINEAR REGULATOR
DC-DC SWITCHES