MAX17075ETG+ Maxim Integrated Products, MAX17075ETG+ Datasheet

IC DC-DC CONV W/CHRG PUMP 24TQFN

MAX17075ETG+

Manufacturer Part Number
MAX17075ETG+
Description
IC DC-DC CONV W/CHRG PUMP 24TQFN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX17075ETG.pdf (22 pages)

Specifications of MAX17075ETG+

Applications
LCD TV/Monitor
Current - Supply
4mA
Voltage - Supply
2.3 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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
+85°C temperature range.
Pin Configuration appears at end of data sheet.
19-4353; Rev 0; 11/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
* EP = Exposed paddle.
+ Denotes a lead-free/RoHS-compliant package.
MAX17075ETG+
Boost Regulator with Integrated Charge Pumps,
Notebook Computer Displays
LCD Monitor Panels
LCD TVs
PART
________________________________________________________________ Maxim Integrated Products
Switch Control, and High-Current Op Amp
-40°C to +85°C
TEMP RANGE
Ordering Information
General Description
Applications
PIN-PACKAGE
24 TQFN-EP*
o 2.5V to 5.5V Input Operating Range
o Current Mode Step-Up Regulator
o High-Current 18V VCOM Buffer
o Regulated Charge Pump for TFT Gate-On Supply
o Regulated Charge Pump for TFT Gate-Off Supply
o Logic-Controlled High-Voltage Switches with
o Soft-Start and Timed Delay Fault Latch for All
o Overload and Thermal Protection
V
2.5V TO 5.5V
GOFF
Adjustable Delay
Outputs
V
AVDD
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
±500mA Output Short-Circuit Current
45V/µs Slew Rate
20MHz -3dB Bandwidth
Rail-to-Rail Output
TO V
V
IN
COM
Simplified Operating Circuit
1μF
10Ω
C5
R1
BGND
VCC
OUT
NEG
POS
REF
AGND
FBN
DRVN
BGND
SUP CTL EP
FROM
TCON
MAX17075
COMP
RSTIN
DEL
PGND
DRVP
COM
DRN
SRC
RST
FBP
LX
FB
V
Features
GON
SYSTEM
FROM
3.3V
V
IN
V
MAIN
1

Related parts for MAX17075ETG+

Image
Part Number
Description
Manufacturer
Datasheet
Request R
MAX17075
Part Number:
MAX17075
Description:
Boost-Regulator
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX17075.pdf (22 pages)
MAX1707
Part Number:
MAX1707
Description:
Light-Management IC
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX1707.pdf (15 pages)
MAX7528KCWP
Part Number:
MAX7528KCWP
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX7528KCWP.pdf (12 pages)
MAX3261CCJ
Part Number:
MAX3261CCJ
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3261CCJ.pdf (12 pages)
MAX3263CAG
Part Number:
MAX3263CAG
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3263CAG.pdf (12 pages)
MAX8809AETL+
Part Number:
MAX8809AETL+
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX8809AETL.pdf (50 pages)
MAX1535CETJ+T
Part Number:
MAX1535CETJ+T
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX1535CETJT.pdf (39 pages)
DS2741N+
Part Number:
DS2741N+
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
MAX13450EAUD+T
Part Number:
MAX13450EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX13451EAUD+T
Part Number:
MAX13451EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX17497BATE+
Part Number:
MAX17497BATE+
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
MAX17502FATB+T
Part Number:
MAX17502FATB+T
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
MAX1978EVKIT
Part Number:
MAX1978EVKIT
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products
MAX2606EUT+
Part Number:
MAX2606EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
MAX2608EUT+
Part Number:
MAX2608EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products

MAX17075ETG+ Summary of contents

Page 1

... Notebook Computer Displays LCD Monitor Panels LCD TVs Ordering Information PART TEMP RANGE MAX17075ETG+ -40°C to +85° Exposed paddle. + Denotes a lead-free/RoHS-compliant package. Pin Configuration appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’ ...

Page 2

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. PGND, BGND to AGND.........................................-0.3V to ...

Page 3

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp ELECTRICAL CHARACTERISTICS (continued +5V, Circuit of Figure 1, V VCC AVDD PARAMETER LX Current Limit LX On-Resistance LX Leakage Current Current-Sense Transresistance Soft-Start Period POSITIVE CHARGE-PUMP ...

Page 4

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp ELECTRICAL CHARACTERISTICS (continued +5V, Circuit of Figure 1, V VCC AVDD PARAMETER DRN-to-COM Switch On-Resistance COM-to-GND Pulldown SRC Input Current OPERATIONAL AMPLIFIERS SUP Supply Range VSUP ...

Page 5

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp ELECTRICAL CHARACTERISTICS (V = +5V, Circuit of Figure AVDD PARAMETER V Input Supply Range CC V Undervoltage-Lockout Threshold CC V Shutdown Current CC ...

Page 6

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp ELECTRICAL CHARACTERISTICS (continued +5V, Circuit of Figure AVDD PARAMETER NEGATIVE CHARGE-PUMP REGULATOR V Input Supply Range SUP FBN Regulation Voltage (V ...

Page 7

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp ( +25°C, unless otherwise noted.) = +25°C, unless otherwise noted STEP-UP REGULATOR EFFICIENCY vs. LOAD CURRENT 100 ...

Page 8

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp (T = +25°C, unless otherwise noted SUPPLY QUIESCENT CURRENT vs. IN SUPPLY VOLTAGE 4.0 3.5 200mA LOAD 3.0 2.5 2.0 1.5 1.0 0.5 0 2.5 3.0 ...

Page 9

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp (T = +25°C, unless otherwise noted.) A OPERATION AMPLIFIER FREQUENCY RESPONSE 2 100pF LOAD LOAD - 100 1k ...

Page 10

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp PIN NAME 1 POS Operational Amplifier Noninverting Input 2 NEG Operational Amplifier Inverting Input 3 OUT Operational Amplifier Output 4 BGND Analog Ground for Operational Amplifier and Charge ...

Page 11

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp V IN 2.5V TO 5.5V (4.5 TO 5.5V FOR FULL LOAD) R1 10Ω C5 1μ COM V AVDD R3 100kΩ R6 13.7kΩ R7 100kΩ V GOFF ...

Page 12

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp POS NEG OUT BGND SRC COM V GON DRN V VCC VCC REF AGND FBN V GOFF DRVN Figure 2. Functional Diagram Detailed Description The MAX17075 contains a ...

Page 13

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp Table 1. Component List DESIGNATION DESCRIPTION 10μF ±20%, 6.3V X5R ceramic capacitors (0603) C1, C2 Murata GRM188R60J106M TDK C1608X5R0J106M 10μF ±20%, 25V X5R ceramic capacitors (1206) C3, C4, ...

Page 14

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp On the rising edge of the internal clock, the controller sets a flip-flop, turning on the n-channel MOSFET and applying the input voltage across the inductor. The cur- ...

Page 15

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp Negative Charge-Pump Regulator The negative charge-pump regulator is typically used to generate the negative supply rail for the TFT LCD gate driver ICs. The output voltage is set ...

Page 16

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp Short-Circuit Current Limit and Input Clamp The operational amplifier limits short-circuit current to approximately ±500mA if the output is directly shorted to SUP or to BGND. If the ...

Page 17

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp Reference Voltage (REF) The reference voltage is nominally 1.25V, and can source at least 50µA (see the Typical Operating Characteristics ). V is the input of the internal ...

Page 18

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp Thermal-Overload Protection Thermal-overload protection prevents excessive power dissipation from overheating the MAX17075. When the junction temperature exceeds +160°C, a thermal sen- sor immediately activates the fault protection, which ...

Page 19

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp The inductor’s saturation current rating and the MAX17075’s LX current limit should exceed I and the inductor’s DC current rating should exceed I . For good efficiency, choose ...

Page 20

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp To further optimize transient response, vary R 20% steps and C in 50% steps while observing COMP transient-response waveforms. Charge-Pump Regulators Selecting the Number of Charge-Pump Stages For ...

Page 21

Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp PCB Layout and Grounding Careful PCB layout is important for proper operation. Use the following guidelines for good PCB layout: • Minimize the area of high-current loops by ...

Page 22

... Maxim reserves the right to change the circuitry and specifications without notice at any time. implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 22 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

Related keywords