Internal-Switch Boost Regulator with Integrated
7-Channel Scan Driver, Op Amp, and LDO
MAX17117
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(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
= -40NC to +85NC, unless oth-
erwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
STEP-UP REGULATOR
Output Voltage Range V
IN
15 V
OPAS Overvoltage Threshold OPAS rising 16.5 18 V
Operating Frequency 1000 1400 kHz
Oscillator Maximum Duty Cycle 91 97 %
FB Regulation Voltage No load 1.227 1.252 V
FB Fault-Trip Level Falling edge 1.05 1.15 V
FB Line Regulation
V
IN
= 2.5V to 5.5V, T
A
= +25NC
0.3 %/V
FB Input-Bias Current
V
FB
= 1.3V, T
A
= +25NC
200 nA
FB Transconductance
DI
COMP
= Q2.5FA, FB = COMP
75 280
FS
LX Current Limit V
FB
= 1.2V, duty cycle = 60% 1.6 2.4 A
LX On-Resistance I
LX
= 1A 500
mI
LX Input-Bias Current
V
LX
= 13.5V, T
A
= +25NC
20
FA
Current-Sense Transresistance 0.10 0.30 V/A
Soft-Start Pullup Current 2 6
FA
VCOM BUFFER
OPAS Voltage Range 5 15 V
OPAS Supply Current V
POS
= V
OPAS
/2, no load 1.2 mA
OUT Voltage Swing High I
OUT
= 5mA
V
OPAS
- 100
mV
OUT Voltage Swing Low I
OUT
= 5mA 100 mV
OUT Short-Circuit Current
Sourcing, short to V
OPAS
/2 - 1V 100
mA
Sinking, short to V
OPAS
/2 + 1V 100
POS Input-Bias Current
V
POS
= V
OPAS
/2, T
A
= +25NC
-50 +50 nA
POS Input-Offset Voltage V
OUT
= V
OPAS
/2 -15 +15 mV
Slew Rate
5V pulse applied to POS, OUT measured from 10% to
90%
10
V/Fs
HIGH-VOLTAGE SCAN DRIVER
GHON Voltage Range 12 35 V
VGL Voltage Range -15 -3 V
GHON-to-VGL Voltage Range V
GHON
- V
VGL
40 V
GHON Supply Current CK1 through CK6 and ST low 550
FA
VGL Supply Current CK1 through CK6 and ST low -500
FA
Output Impedance Low STH, CKH_, VGLC, I
OUT
= -20mA 80
I
Output Impedance High STH, CKH_, VGLC, I
OUT
= +20mA 80
I
Gate-Shading Switch Resistance
CKH1, CKH3, CKH5, I
RE
= 10mA 100
I
CKH2, CKH4, CKH6, I
RO
= 10mA 100
RO, RE Resistance Range 100
I
Propagation Delay from ST
Rising Edge to STH Rising Edge
C
LOAD
= 100pF, R
LOAD
= 0I
200 ns
(16 Seiten)
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