Internal-Switch Boost Regulator with Integrated
7-Channel Scan Driver, Op Amp, and LDO
MAX17117
2 ______________________________________________________________________________________
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
IN, ENA, FB, COMP, SS, DTS, LDOADJ, ST,
CK1–CK6, LDOO to AGND ...............................-0.3V to +7.5V
PGND to AGND ....................................................-0.3V to +0.3V
LX, OPAS to PGND ...............................................-0.3V to +18V
GHON to PGND ....................................................-0.3V to +45V
VGL to PGND ....................................................... -20V to +0.3V
GHON to VGL .................................................................... +45V
STH, CKH1–CKH6, VGLC, RO,
RE to VGL .........................................-0.3V to (V
GHON
+ 0.3V)
OUT, POS to PGND ..............................-0.3V to (V
OPAS
+ 0.3V)
GHON and VGL RMS Current Rating ..................................0.8A
VGLC, STH, and CKH1–CKH6 RMS Current Rating ...........0.8A
LX, PGND RMS Current Rating ............................................1.6A
Continuous Power Dissipation (T
A
= +70NC)
32-Pin TQFN (derate 24.9mW/NC above +70NC) .......1990mW
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range ............................ -65NC to +160NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
ELECTRICAL CHARACTERISTICS
(V
IN
= +3V, Circuit of Figure 1, V
OPAS
= +8.5V, V
GHON
= +24V, V
VGL
= -6.2V, V
ST
= V
CK
_ = 0V, T
A
= 0NC to +85NC, unless otherwise
noted. Typical values are at T
A
= +25NC.)
ABSOLUTE MAXIMUM RATINGS
PARAMETER CONDITIONS MIN TYP MAX UNITS
IN Input Voltage Range 2.3 5.5 V
IN Undervoltage-Lockout
Threshold
V
IN
rising, typical hysteresis = 150mV 1.80 2.00 2.20 V
IN Quiescent Current
V
FB
= 1.3V, LX not switching 1.0 2.5
mA
V
FB
= 1.2V, LX switching 2.5 5
IN Standby Current V
ENA
= V
VGL
= 0V, V
IN
= 5.5V, V
GHON
= 4V 0.7 2 mA
GHON Standby Current V
ENA
= V
VGL
= 0V, V
IN
= 5.5V, V
GHON
= 4V 100 200
FA
OPAS Standby Current V
ENA
= V
VGL
= 0V, V
IN
= 5.5V, V
GHON
= 4V 20 50
FA
Thermal Shutdown Temperature rising 145 170
NC
STEP-UP REGULATOR
Output Voltage Range V
IN
15 V
OPAS Overvoltage Threshold OPAS rising 16.5 17 18 V
Operating Frequency 1000 1200 1400 kHz
Oscillator Maximum Duty Cycle 91 94 97 %
FB Regulation Voltage No load 1.227 1.240 1.252 V
FB Fault-Trip Level Falling edge 1.05 1.10 1.15 V
Fault-Trigger Delay 160 ms
FB Load Regulation 0 < I
LOAD
< full load -0.2 %
FB Line Regulation
V
IN
= 2.5V to 5.5V, T
A
= +25NC
0.1 0.25 %/V
FB Input-Bias Current
V
FB
= 1.24V, T
A
= +25NC
65 200 nA
FB Transconductance
DI
COMP
= Q2.5FA, FB = COMP
75 160 280
FS
LX Current Limit
R
ENA
= 10kW, duty cycle = 60%
1.6 2 2.4 A
LX On-Resistance I
LX
= 1A 200 500
mI
LX Input-Bias Current
V
LX
= 13.5V, T
A
= +25NC
10 20
FA
Current-Sense Transresistance 0.10 0.20 0.30 V/A
Soft-Start Pullup Current 2 4 6
FA
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