User Manual
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, Circuit of Figure 1, V
AVDD
= V
SUP
= +13V, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Input Supply Range 2.5 5.5 V
V
CC
Undervoltage-Lockout Threshold V
CC
rising, hysteresis (typ) = 50mV 2.05 2.45 V
V
CC
Shutdown Current 200 μA
V
FB
= 1.3V, not switching 1.5
V
CC
Quiescent Current
V
FB
= 1.0V, switching 5
mA
REFERENCE
REF Output Voltage No external load 1.230 1.267 V
REF Load Regulation 0 < I
LOAD
< 50μA 6 mV
REF Sink Current In regulation 10 μA
REF Undervoltage-Lockout Threshold Rising edge, hysteresis (typ) = 200mV 1.15 V
OSCILLATOR AND TIMING
Frequency 1000 1400 kHz
Oscillator Maximum Duty Cycle 86 94 %
Duration to Trigger Fault Condition FB or FBP or FBN below threshold 47 65 ms
DEL Capacitor Charge Current During startup, V
DEL
= 1.0V 4 6 μA
DEL Turn-On Threshold 1.19 1.31 V
STEP-UP REGULATOR
Output Voltage Range V
IN
18 V
FB Regulation Voltage FB = COMP, C
COMP
= 1nF 1.230 1.267 V
FB Fault Trip Level Falling edge 0.96 1.04 V
FB Line Regulation V
CC
= 2.5V to 5.5V -0.25 +0.25 %/V
FB Input Bias Current V
FB
= 1.25V 50 200 nA
FB Transconductance I = ±2.5μA at COMP, FB = COMP 75 280 μS
LX Current Limit V
FB
= 1.1V, duty cycle = 75% 2.5 3.5 A
LX On-Resistance I
LX =
200mA 0.25
Current-Sense Transresistance 0.10 0.30 V/A
POSITIVE CHARGE-PUMP REGULATOR
V
SUP
Input Supply Range 6 18 V
V
SUP
Overvoltage Threshold V
SUP
= rising, hysteresis = 200mV 19 21 V
FBP Regulation Voltage -2% 1.25 +2% V
FBP Line Regulation Error V
SUP
= 8V to 18V, V
GON
= 30V 0.2 %/V
FBP Input Bias Current V
FBP
= 1.5V, T
A
= +25°C -50 +50 nA
DRVP PCH On-Resistance 6
DRVP NCH On-Resistance 3
FBP Fault Trip Level Falling edge 0.96 1.04 V
Positive Charge-Pump Soft-Start Period
7-bit voltage ramp with filtering to prevent
high peak currents
5 ms