19-5206; Rev 0; 4/10
MAX17117 Evaluation Kit
The MAX17117 evaluation kit (EV kit) is a fully assembled and tested surface-mount PCB that provides the
voltages and features required for active-matrix, thin-film
transistor (TFT), liquid-crystal display (LCD) applications. The EV kit contains a high-performance step-up
regulator, a 350mA low-dropout (LDO) linear regulator,
a high-speed operational amplifier (op amp), a positive
charge pump for the TFT gate-on supply, a negative
charge pump for the TFT gate-off supply, and a 7-output
high-voltage, level-shifting scan driver with gate-shading
control.
The EV kit operates from a DC supply voltage of +2.3V
to +5.5V. The step-up switching regulator is configured
for a +8.5V output providing at least 250mA from a +2.7V
input. The positive charge pump is configured to provide
a +23V output providing at least 20mA. The negative
charge pump is configured to provide a -6V output
providing at least 10mA. The op amp is configured for
+4.25V. The high-voltage, level-shifting scan driver with
gate-shading control is designed to drive the TFT panel
gate drivers.
Features
S +2.3V to +5.5V Input Range
S Output Voltages
+8.5V Output at 250mA from a +2.7V Input
(Step-Up Switching Regulator)
+23V Output at 20mA (Positive Charge Pump)
-6V Output at 10mA (Negative Charge Pump)
+4.25V High-Current Op Amp Capable of
Delivering 200mA (typ) Short-Circuit Output
Current
S Resistor-Adjustable Switching-Regulator, Op-Amp
Output, and LDOO Voltages
S High-Voltage Level-Shifting Scan Driver with
Gate-Shading Control
S 1.2MHz Step-Up Switching Frequency
S Fully Assembled and Tested
Ordering Information
PART
TYPE
MAX17117EVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION
C1
C2, C3, C4
C5
C6–C11, C16,
C17, C21
QTY
DESCRIPTION
1
10FF Q10%, 10V X5R ceramic
capacitor (0805)
TDK C2012X5R1A106K
Murata GRM21BR61A106K
3
10FF Q10%, 16V X5R ceramic
capacitors (1206)
Murata GRM31CR61C106K
TDK C3216X5R1C106K
1
0.22FF Q10%, 50V X7R ceramic
capacitor (0805)
Murata GRM21BR71H224K
TDK C2012X7R1H224K
9
0.1FF Q10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H104K
TDK C1608X7R1H104K
DESIGNATION
QTY
DESCRIPTION
C12, C13
2
1FF Q10%, 16V X5R ceramic
capacitors (0603)
Murata GRM188R61C105K
TDK C1608X5R1C105K
C14
1
100pF Q5%, 50V C0G ceramic
capacitor (0603)
Murata GRM1885C1H101J
C15, C25, C27,
C29, C31, C33,
C35, C37
8
4700pF Q10%, 50V X7R ceramic
capacitors (0603)
Murata GRM188R71H472K
1
1FF Q10%, 25V X5R ceramic
capacitor (0805)
Murata GRM21BR71E105K
TDK C2012X5R1E105K
1
1000pF Q10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H102K
TDK C1608X7R1H102K
C18
C19
________________________________________________________________ Maxim Integrated Products 1
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.
Evaluates: MAX17117
General Description
Evaluates: MAX17117
MAX17117 Evaluation Kit
Component List (continued)
DESIGNATION
C20
C22
C23
C24, C26, C28,
C30, C32, C34,
C36, C38, C39
DTS, LX, POS,
RE, RO, SS
D1
D2, D3, D4
D5
QTY
DESIGNATION
QTY
1
3-pin header
1
0.33FF Q10%, 10V X5R ceramic
capacitor (0603)
Murata GRM188R61A334K
TDK C1608X5R1A334K
JU1
L1
1
10FH, 1.85A, 74.4mI inductor
(6mm x 6mm x 3mm)
Sumida CDRH5D28RHPNP-100M
P1
0
1
0.22FF Q10%, 25V X5R ceramic
capacitor (0603)
Murata GRM188R61E224K
TDK C1608X5R1E224K
Not installed, 100-position rightangle header
R1
1
102kI Q1% resistor (0603)
1
0
6
1
3
1
DESCRIPTION
2.2FF Q10%, X5R 25V ceramic
capacitor (0805)
Murata GRM219R61E225K
TDK C2012X5R1E225K
R2
1
17.4kI Q1% resistor (0603)
R3, R4, R5
3
56.2kI Q1% resistors (0603)
R6, R12
2
1kI Q5% resistors (0603)
R7, R15, R16,
R17
0
Not installed, resistors—short
(PC trace) (0603)
R8
1
62kI Q5% resistor (0603)
R9
1
51.1kI Q1% resistor (0603)
R10
1
49.9kI Q1% resistor (0603)
R11
1
29.4kI Q1% resistor (0603)
R13
1
49.9I Q1% resistor (0603)
R14
1
86.6I Q1% resistor (0603)
R18–R24
7
100kI Q5% resistors (0603)
R25–R38
14
100I Q1% resistors (1210)
R39
0
Not installed, resistor (0603)
SW1
1
7-position, low-profile, surfacemount DIP switch
U1
1
High-voltage PWM IC with level
shifters (32 TQFN-EP*)
Maxim MAX17117ETJ+
—
1
Shunt
—
1
PCB: MAX17117 EVALUATION
KIT+
Not installed, ceramic capacitors
(0603)
PCB mini test points
1A, 30V Schottky diode (S-Flat)
Central Semi CMMSH1-40 LEAD
FREE
Nihon EP10QY03
Toshiba CRS02(TE85L,Q,M)
200mA, 100V dual diodes
(SOT23)
Fairchild MMBD4148SE
(Top Mark: D4)
Central Semi CMPD7000+
(Top Mark: C5C)
6.2V, 200mW zener diode
(SOD323)
Fairchild MM3Z6V2B
DESCRIPTION
*EP = Exposed pad.
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Central Semiconductor Corp.
631-435-1110
www.centralsemi.com
Fairchild Semiconductor
888-522-5372
www.fairchildsemi.com
Murata Electronics North America, Inc.
770-436-1300
www.murata-northamerica.com
Nihon Inter Electronics Corp.
847-843-7500
www.niec.co.jp
Sumida Corp.
847-545-6700
www.sumida.com
TDK Corp.
847-803-6100
www.component.tdk.com
Toshiba America Electronic Components, Inc.
949-623-2900
www.toshiba.com/taec
Note: Indicate that you are using the MAX17117 when contacting these component suppliers.
2 _______________________________________________________________________________________
MAX17117 Evaluation Kit
Recommended Equipment
• 2.3V to 5.5V, 2A DC power supply
• Voltmeters
Procedure
The MAX17117 EV kit is fully assembled and
tested. Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
1) Verify that a shunt is installed across pins 1-2 of
jumper JU1.
2) Verify that SW1 DIP switches are in the off position.
3) Connect the positive terminal of the power supply
to the VIN pad. Connect the negative terminal of the
power supply to the PGND pad. Set VIN to +3V.
4) Turn on the power supply and verify that the step-up
switching regulator output (VMAIN) is +8.5V.
5) Verify that the gate-on supply (GHON) is approximately +23V.
6) Verify that the gate-off supply (VGL) is approximately
-6V.
7) Verify that the output of the high-speed op amp
(VOUT) is approximately +4.25V.
8) Verify that the outputs of the high-voltage scan-driver
outputs are approximately -6V (= VGL).
Detailed Description of Hardware
The MAX17117 EV kit contains a step-up switching
regulator, a positive two-stage charge pump, a negative
single-stage charge pump, a high-speed op amp, and a
high-voltage, level-shifting scan driver with gate-shading
control. The EV kit operates from a DC power supply
between +2.3V and +5.5V.
As configured, the step-up switching regulator (VMAIN)
generates a +8.5V output and provides at least 250mA
from a +2.7V input. The step-up switching-regulator
output voltage can be adjusted up to +15V with different
feedback resistors (see the Output-Voltage Selection
section).
The GHON consists of two positive charge-pump stages
to generate approximately +23V and provides up to
20mA. The VGL consists of a single negative chargepump stage configured with a shunt zener diode to
generate approximately -6V and provides up to 10mA.
Loading GHON and VGL reduces the available VMAIN
current proportionally.
The op-amp output (VOUT) is fixed to +4.25V or can be
reconfigured to other voltages with changes to the voltage-divider resistors (see the Output-Voltage Selection
section).
The high-voltage, level-shifting scan driver with gateshading control is designed to drive the TFT panel gate
drivers. Its seven outputs swing 40V (max) between
+35V (max) and -15V (min) and swiftly drives capacitive loads. The driver outputs (STH, CKH1–CKH6) swing
between their power-supply rails (GHON and VGL)
according to the input logic levels on their corresponding inputs (ST, CK1–CK6) except during a gate-shading
period. During a gate-shading period, a CKH_ output
driver becomes high impedance, and an internal switch
connected between the CKH_ output’s capacitive load
and either RO or RE closes whenever the state of its corresponding CK_ input is logic-low. This allows a portion
of an output’s GHON-to-VGL transition to be completed
by partially discharging its capacitive load through an
external resistor attached to either RO or RE, for a duration set by the gate-shading period.
For further details, refer to the High-Voltage Scan Driver
section in the MAX17117 IC data sheet.
P1 provides an easy interface to connect external
circuitry containing the ST and CK1–CK6 logic signals
to the EV kit. When driving the ST and CK1–CK6 logic
signals through P1, place all SW1 switches in the on
position.
Table 1. Jumper JU1 Functions
SHUNT POSITION
ENA PIN
EV KIT OUTPUTS
1-2
ENA connected to LDOO through resistor R8
Outputs enabled
(VMAIN = +8.5V)
2-3
ENA connected to ground
Outputs disabled
(VMAIN ~ VIN)
*Default position.
_______________________________________________________________________________________ 3
Evaluates: MAX17117
Quick Start
Evaluates: MAX17117
MAX17117 Evaluation Kit
Jumper Selection (JU1)
The EV kit incorporates jumper JU1 to control the chipenable control. See Table 1 for jumper JU1 functions.
Output-Voltage Selection
Step-Up Switching-Regulator Output Voltage
(VMAIN)
The EV kit’s step-up switching-regulator output (VMAIN)
is set to +8.5V by feedback resistors R1 and R2. To
generate output voltages other than +8.5V (up to +15V),
select different external voltage-divider resistors R1 and
R2. For instructions on selecting the step-up switching
regulator feedback divider resistors for other output voltages, refer to the Output-Voltage Selection section in the
MAX17117 IC data sheet.
Note that changing the VMAIN voltage setting changes
the GHON and VGL charge-pump output voltages.
The voltage range of VGL is limited to -15V. The volt-
age range of GHON is limited to +35V. The voltage
difference between GHON and VGL should not exceed
+40V. If VMAIN is set for more than +11V, disconnect
the GHON and VGL pins from the charge-pump outputs.
If operation of the high-voltage scan driver is desired for
VMAIN greater than +11V, power GHON and VGL from
an external supply.
Op-Amp Output Voltage (VOUT)
The EV kit’s op amp is configured internally as a unitygain buffer. The voltage at the noninverting input (POS)
is set to half of VMAIN by voltage-divider resistors R4
and R5. To set VOUT to other voltages (up to VMAIN),
select different divider resistors according to the following equation:
VMAIN
R4 = R5 ×
− 1
VOUT
4 _______________________________________________________________________________________
MAX17117 Evaluation Kit
Figure 1a. MAX17117 EV Kit Schematic (Sheet 1 of 3)
_______________________________________________________________________________________ 5
Evaluates: MAX17117
Evaluates: MAX17117
MAX17117 Evaluation Kit
Figure 1b. MAX17117 EV Kit Schematic (Sheet 2 of 3)
6 _______________________________________________________________________________________
MAX17117 Evaluation Kit
Evaluates: MAX17117
Figure 1c. MAX17117 EV Kit Schematic (Sheet 3 of 3)
_______________________________________________________________________________________ 7
Evaluates: MAX17117
MAX17117 Evaluation Kit
1.0”
Figure 2. MAX17117 EV Kit Component Placement Guide—Component Side
1.0”
Figure 3. MAX17117 EV Kit PCB Layout—Component Side
8 _______________________________________________________________________________________
MAX17117 Evaluation Kit
Evaluates: MAX17117
1.0”
Figure 4. MAX17117 EV Kit PCB Layout—Solder Side
_______________________________________________________________________________________ 9
Evaluates: MAX17117
MAX17117 Evaluation Kit
Revision History
REVISION
NUMBER
REVISION
DATE
0
4/10
DESCRIPTION
Initial release
PAGES
CHANGED
—
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
10
© 2010
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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