EVALUATION KIT AVAILABLE
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
General Description
The MAX17075 includes a high-voltage boost regulator,
one high-current operational amplifier, two regulated
charge pumps, and one MLG block for gate-driver
supply modulation.
The step-up DC-DC converter is a 1.2MHz current-
mode boost regulator with a built-in power MOSFET. It
provides fast load-transient response to pulsed loads
while producing efficiencies over 85%. The built-in
160mΩ (typ) power MOSFET allows output voltages as
high as 18V boosted from inputs ranging from 2.5V to
5.5V. A built-in 7-bit digital soft-start function controls
startup inrush currents.
The gate-on and gate-off charge pumps provide regu-
lated TFT gate-on and gate-off supplies. Both output
voltages can be adjusted with external resistive
voltage-dividers.
The operational amplifier, typically used to drive the
LCD backplane (VCOM), features high-output short-cir-
cuit current (±500mA), fast slew-rate (45V/µs), wide
bandwidth (20MHz), and rail-to-rail outputs.
The MAX17075 is available in a 24-pin thin QFN pack-
age with 0.5mm lead spacing. The package is a square
(4mm x 4mm) with a maximum thickness of 0.8mm for
ultra-thin LCD design. It operates over the -40°C to
+105°C temperature range.
Features
♦
2.5V to 5.5V Input Operating Range
♦
Current Mode Step-Up Regulator
Fast-Transient Response
Built-In 20V, 3A, 0.16Ω n-Channel Power MOSFET
Cycle-by-Cycle Current Limit
87% Efficiency (5V Input to 13V Output)
1.2MHz Switching Frequency
±1% Output Voltage Regulation Accuracy
♦
High-Current 18V VCOM Buffer
±500mA Output Short-Circuit Current
45V/µs Slew Rate
20MHz -3dB Bandwidth
Rail-to-Rail Output
♦
Regulated Charge Pump for TFT Gate-On Supply
♦
Regulated Charge Pump for TFT Gate-Off Supply
♦
Logic-Controlled High-Voltage Switches with
Adjustable Delay
♦
Soft-Start and Timed Delay Fault Latch for All
Outputs
♦
Overload and Thermal Protection
Simplified Operating Circuit
V
IN
2.5V TO 5.5V
R1
10Ω
C5
1µF
TO V
COM
OUT
V
AVDD
VCC
LX
PGND
FB
COMP
FROM
SYSTEM
3.3V
V
IN
V
MAIN
Applications
Notebook Computer Displays
LCD Monitor Panels
LCD TVs
Ordering Information
PART
MAX17075ETG+
MAX17075GTG/V+
TEMP RANGE
-40°C to +85°C
-40°C to +105°C
PIN-PACKAGE
24 TQFN-EP*
24 TQFN-EP*
MAX17075
BGND
NEG
POS
REF
COM
AGND
FBN
DRVP
V
GOFF
DRVN
SRC
V
GON
RST
RSTIN
DRN
*EP
= Exposed pad.
+Denotes
a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
BGND
SUP CTL EP
FBP
DEL
Pin Configuration appears at end of data sheet.
FROM
TCON
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-4353; Rev 2; 12/12
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
ABSOLUTE MAXIMUM RATINGS
VCC, CTL, RSTIN, RST to AGND ..........................-0.3V to +7.5V
DEL, REF, COMP, FB, FBN,
FBP to AGND .......................................-0.3V to (V
VCC
+ 0.3V)
PGND, BGND to AGND.........................................-0.3V to +0.3V
LX to PGND ............................................................-0.3V to +20V
SUP to PGND .........................................................-0.3V to +20V
DRVN, DRVP to PGND..............................-0.3V to (V
SUP
+ 0.3V)
SRC, COM, DRN to AGND .....................................-0.3V to +40V
DRN to COM............................................................-30V to +30V
SRC to SUP ............................................................................23V
REF Short Circuit to AGND.........................................Continuous
POS, NEG, OUT to AGND...........................-0.3V to (V
SUP
+ 0.3)
DRVN, DRVP RMS Current ...............................................200mA
LX, PGND RMS Current Rating.............................................2.4A
Continuous Power Dissipation (T
A
= +70°C)
24-Pin TQFN (derate 27.8mW/°C above +70°C).......2222mW
Operating Temperature Range, E Grade ............-40°C to +85°C
Operating Temperature Range, G Grade .........-40°C to +105°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
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.
ELECTRICAL CHARACTERISTICS
(V
VCC
= +5V, Circuit of Figure 1, V
AVDD
= V
SUP
= +13V,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
V
CC
Input Supply Range
V
CC
Undervoltage-Lockout (UVLO) Threshold
V
CC
Shutdown Current
V
CC
Quiescent Current
REFERENCE
REF Output Voltage
REF Load Regulation
REF Sink Current
REF Undervoltage-Lockout Threshold
OSCILLATOR AND TIMING
Frequency
Oscillator Maximum Duty Cycle
Duration to Trigger Fault Condition
DEL Capacitor Charge Current
DEL Turn-On Threshold
DEL Discharge Switch On-Resistance
STEP-UP REGULATOR
Output Voltage Range
FB Regulation Voltage
FB Fault Trip Level
FB Load Regulation
FB Line Regulation
FB Input Bias Current
FB Transconductance
FB Voltage Gain
FB = COMP, C
COMP
= 1nF
Falling edge
0 < I
LOAD
< full, transient only
V
CC
= 2.5V to 5.5V
V
FB
= 1.25V
I = ±2.5µA at COMP, FB = COMP
FB to COMP
V
VCC
1.238
0.96
-0.2
50
75
1.250
1
-1
0
125
160
2600
+0.2
200
280
18
1.262
1.04
V
V
V
%
%/V
nA
µS
V/V
FB or FBP or FBN below threshold
During startup, V
DEL
= 1.0V
1000
87
47
4
1.19
1200
90
55
5
1.25
20
1400
93
65
6
1.31
kHz
%
ms
µA
V
No external load
0n < I
LOAD
< 50µA
In regulation
Rising edge, hysteresis (typ) = 200mV
1.238
10
1
1.17
1.250
1.262
6
V
mV
µA
V
V
CC
rising, hysteresis (typ) = 50mV
V
CC
= 2V
V
FB
= 1.3V, not switching
V
FB
= 1.0V, switching
CONDITIONS
MIN
2.5
2.05
2.25
100
1
4
TYP
MAX
5.5
2.45
200
1.5
5
UNITS
V
V
µA
mA
2
Maxim Integrated
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
ELECTRICAL CHARACTERISTICS (continued)
(V
VCC
= +5V, Circuit of Figure 1, V
AVDD
= V
SUP
= +13V,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
LX Current Limit
LX On-Resistance
LX Leakage Current
Current-Sense Transresistance
Soft-Start Period
POSITIVE CHARGE-PUMP REGULATOR
V
SUP
Input Supply Range
V
SUP
Overvoltage Threshold
Operating Frequency
FBP Regulation Voltage
FBP Line Regulation Error
FBP Input Bias Current
DRVP Current Limit
DRVP PCH On-Resistance
DRVP NCH On-Resistance
FBP Fault Trip Level
Positive Charge-Pump Soft-Start Period
NEGATIVE CHARGE-PUMP REGULATOR
V
SUP
Input Supply Range
Operating Frequency
FBN Regulation Voltage (V
REF
- V
FBN
)
FBN Input Bias Current
FBN Line Regulation Error
DRVN PCH On-Resistance
DRVN NCH On-Resistance
DRVN Current Limit
FBN Fault Trip level
Negative Charge-Pump Soft-Start Period
Not in dropout
Rising edge
7-bit voltage ramp with filtering to prevent
high peak currents
V
REF
- V
FBN
= 1V
V
FBN
= 0V, T
A
= +25°C
V
SUP
= 9V to 18V, V
GOFF
= -7V
4
1.5
400
450
3
5
-1.5%
-50
6
0.5 x
f
OSC
1
+1.5%
+50
0.2
6
3
mA
mV
ms
18
V
Hz
V
nA
%/V
Falling edge
7-bit voltage ramp with filtering to prevent
high peak currents
0.96
V
SUP
= 12V to 18V, V
GON
= 30V
V
FBP
= 1.5V, T
A
= +25°C
Not in dropout
-1.5%
-50
400
4
1.5
1
3
6
3
1.04
5
V
ms
V
SUP
= rising, hysteresis = 200mV
6
19
20
0.5 x
f
OSC
1.250
+1.5%
0.2
+50
18
21
V
V
Hz
V
%/V
nA
mA
7-bit current ramp
I
LX =
200mA
V
LX =
19V, T
A
= +25°C
0.1
CONDITIONS
V
FB
= 1.1V, duty cycle = 75%
MIN
2.5
TYP
3.0
0.16
10
0.2
14
MAX
3.5
0.25
20
0.3
µA
V/A
ms
UNITS
A
POSITIVE GATE DRIVER TIMING AND CONTROL SWITCHES
CTL Input Low Voltage
CTL Input High Voltage
CTL Input Current
CTL-to-COM Rising Propagation Delay
SRC Input Voltage Range
SRC-to-COM Switch On-Resistance
Maxim Integrated
0.6
2
V
CTL
= 0V or V
VCC
, T
A
= +25°C
C
LOAD
= 100pF
V
DEL
= 1.5V, CTL = VCC
-1
250
36
5
10
+1
V
V
µA
ns
V
3
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
ELECTRICAL CHARACTERISTICS (continued)
(V
VCC
= +5V, Circuit of Figure 1, V
AVDD
= V
SUP
= +13V,
T
A
= 0°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
DRN-to-COM Switch On-Resistance
COM-to-GND Pulldown
SRC Input Current
OPERATIONAL AMPLIFIERS
SUP Supply Range
VSUP Undervoltage Threshold
SUP Supply Current
Input Offset Voltage
Input Bias Current
Input Common-Mode Voltage Range
Input Common-Mode Rejection Ratio
Output-Voltage-Swing High
Output-Voltage-Swing Low
Large-Signal Voltage Gain
Slew Rate
-3dB Bandwidth
Short-Circuit Current
XAO CONTROL
RSTIN Threshold
RSTIN Input Current
RSTIN Hysteresis
RST Output Voltage
RST Blanking Time
XAO UVLO
I
SINK
= 1mA
Counting from V
VCC
crossing 2.25V
V
VCC
rising with hysteresis of 50mV
160
220
1.5
Falling edge at V
CC
= 5V
Falling edge at V
CC
= 1.8V
T
A
= +25°C
1.225
1.213
-1
50
0.4
280
1.7
1.250
1.250
1.275
1.287
+1
V
µA
mV
V
ms
V
Sourcing
Sinking
500
500
I
OUT =
50mA
I
OUT =
-50mA
V
OUT
= 1V to (V
SUP
- 1)V
80
45
20
V
SUP
-
350
350
Buffer configuration, V
POS
= V
SUP
/2, no load
V
NEG
, V
POS
= V
SUP
/2
V
NEG
, V
POS
= V
SUP
/2, T
A
= +25°C
-1
0
80
6
3.8
4
4
18
4.2
6.5
12
+1
V
SUP
V
V
mA
mV
µA
V
dB
mV
mV
dB
V/µs
MHz
mA
V
DEL
= 0V
V
DEL
= 1.5V, CTL = VCC
V
DEL
= 1.5V, CTL = AGND
CONDITIONS
V
DEL
= 1.5V, CTL = AGND
MIN
TYP
30
1.5
300
200
MAX
60
2.5
600
360
UNITS
Ω
kΩ
µA
4
Maxim Integrated
MAX17075
Boost Regulator with Integrated Charge Pumps,
Switch Control, and High-Current Op Amp
ELECTRICAL CHARACTERISTICS
(V
CC
= +5V, Circuit of Figure 1, V
AVDD
= V
SUP
= +13V,
T
A
= -40°C to +105°C,
unless otherwise noted.) (Note 1)
PARAMETER
V
CC
Input Supply Range
V
CC
Undervoltage-Lockout Threshold
V
CC
Shutdown Current
V
CC
Quiescent Current
REFERENCE
REF Output Voltage
REF Load Regulation
REF Sink Current
REF Undervoltage-Lockout Threshold
OSCILLATOR AND TIMING
Frequency
Oscillator Maximum Duty Cycle
Duration to Trigger Fault Condition
DEL Capacitor Charge Current
DEL Turn-On Threshold
STEP-UP REGULATOR
Output Voltage Range
FB Regulation Voltage
FB Fault Trip Level
FB Line Regulation
FB Input Bias Current
FB Transconductance
LX Current Limit
LX On-Resistance
Current-Sense Transresistance
POSITIVE CHARGE-PUMP REGULATOR
V
SUP
Input Supply Range
V
SUP
Overvoltage Threshold
FBP Regulation Voltage
FBP Line Regulation Error
FBP Input Bias Current
DRVP PCH On-Resistance
DRVP NCH On-Resistance
FBP Fault Trip Level
Positive Charge-Pump Soft-Start Period
V
SUP
= rising, hysteresis = 200mV
V
SUP
= 8V to 18V, V
GON
= 30V
V
FBP
= 1.5V, T
A
= +25°C
6
19
-2%
-50
1.25
18
21
+2%
0.2
+50
6
3
1.04
5
V
V
V
%/V
nA
Ω
Ω
V
ms
FB = COMP, C
COMP
= 1nF
Falling edge
V
CC
= 2.5V to 5.5V
V
FB
= 1.25V
∆I
= ±2.5µA at COMP, FB = COMP
V
FB
= 1.1V, duty cycle = 75%
I
LX =
200mA
0.10
V
IN
1.230
0.96
-0.25
50
75
2.5
18
1.267
1.04
+0.25
200
280
3.5
0.25
0.30
V
V
V
%/V
nA
µS
A
Ω
V/A
FB or FBP or FBN below threshold
During startup, V
DEL
= 1.0V
1000
86
47
4
1.19
1400
94
65
6
1.31
kHz
%
ms
µA
V
No external load
0 < I
LOAD
< 50µA
In regulation
Rising edge, hysteresis (typ) = 200mV
10
1.17
1.230
1.267
6
V
mV
µA
V
V
FB
= 1.3V, not switching
V
FB
= 1.0V, switching
V
CC
rising, hysteresis (typ) = 50mV
CONDITIONS
MIN
2.5
2.05
TYP
MAX
5.5
2.45
200
1.5
5
UNITS
V
V
µA
mA
Falling edge
7-bit voltage ramp with filtering to prevent
high peak currents
0.96
Maxim Integrated
5
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