View MAX1763EVKIT_364978.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-1804; Rev 0; 9/00
MAX1763 Evaluation Kit
General Description
The MAX1763 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains two separate boost switching-regulator circuits. The first circuit (left side) utilizes a MAX1763 in a 16-pin QSOP package and is configured for a +3.3V output that accepts inputs from a +0.7V to VOUT source and provides up to 1.1A of current. A 1- or 2-cell alkaline battery source can also power the input. The second circuit (right side) uses a MAX1763 in a high-power 16-pin TSSOP-EP (exposed pad) package, is configured for a +3.3V output, and supplies up to 1.4A of current. It accepts inputs from a +0.7V to +5.5V source, or a 1- or 2-cell alkaline battery can power the input. The right side includes a low-dropout (LDO) linear regulator that draws power from the +3.3V output and provides +2.8V at up to 1A of current. The MAX1763 features an internal N-channel MOSFET switch, a P-channel MOSFET synchronous rectifier, and pulse-width modulation (PWM) operation for maximum efficiency. The MAX1763 EV kit demonstrates low quiescent current and high efficiency up to 96% for maximum battery life. Operation at 1MHz allows the use of tiny surface-mount components. o +0.7V to +5.5V Input Range o Output Voltages +3.3V Fixed Output at 1.1A (left side) +3.3V Fixed Output at 1.4A (right side) +2.8V LDO Linear Regulator Output at 1A (right side) as Shipped o Internal N-Channel Power Switch and P-Channel Synchronous Rectifier o 1A Shutdown Current o 1MHz Switching Frequency o Externally Synchronizable (500kHz to 1.2MHz) o Surface-Mount Components o Fully Assembled and Tested
Features
Evaluates: MAX1763
Ordering Information
PART MAX1763EVKIT TEMP. RANGE 0C to +70C IC PACKAGE 16 QSOP, 16 TSSOP-EP
Component List
DESIGNATION QTY* C1, C11 2 DESCRIPTION 33F, 16V low-ESR electrolytic capacitors (POSCAP) Sanyo 16TPC33M 100F, 6.3V low-ESR electrolytic capacitors (POSCAP) Sanyo 6TPC100M 68F, 10V low-ESR electrolytic capacitor (POSCAP) Sanyo 10TPC68M 1F, 10V X5R ceramic caps (0805) Taiyo Yuden LMK212BJ105MG 0.22F, 25V X7R ceramic capacitors (1206) Taiyo Yuden TMK316BJ224KF Not installed (0805) 2.2A, 40V Schottky diode Nihon EC31QS04 2.2A, 40V Schottky diode; not installed, but recommended for low-voltage startup Nihon EC31QS04 3-pin headers DESIGNATION QTY* L1, L2 2 DESCRIPTION 1.5H inductors Coilcraft DS3316P-152 -20V, 4.5A P-channel MOSFET (SuperSOT-6) Fairchild Semiconductor FDC638P Not installed (0805) 100k 1% resistor (0805) 4.7 5% resistors (0805) 20k 5% resistor (0805) 182k 1% resistor (0805) 90.9k 1% resistor (0805) 100k 5% resistor (0805) MAX1763EEE (16-pin QSOP) MAX1763EUE (16-pin TSSOP-EP) Shunts for JU1-JU8 MAX1763 PC board MAX1763 data sheet MAX1763 EV kit data sheet
C2, C3, C12, C13
P1 R1, R2, R3, R6, R7, R9, R10, R14, R15 R4 R5, R13 R8 R11 R12 R16 U1 U2 None None None None
1
4
0 1 2 1 1 1 1 1 1 8 1 1 1
C4 C5, C8, C10, C14, C15, C18 C6, C16 C7, C9, C17, C19 D1
1
6
2
0 1
D2 JU1-JU8
0 8
*Quantities are for both circuits. 1
________________________________________________________________ Maxim Integrated Products
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MAX1763 Evaluation Kit Evaluates: MAX1763
Component Suppliers
SUPPLIER Coilcraft Fairchild Nihon USA Sanyo USA Taiyo Yuden PHONE 847-639-6400 408-822-2000 661-867-2555 619-661-6835 408-573-4150 FAX 847-639-1469 408-822-2102 661-867-2698 619-661-1055 408-573-4159
above 1A, see the Linear Output and +3.3V Output Power section.
Detailed Description
The MAX1763 EV kit contains two separate boost switching-regulator circuits using different package technologies. Both circuits provide a +3.3V output. The left circuit requires a +0.7V to VOUT input voltage range. The +3.3V output supplies up to 1.1A of current. A low-battery detection circuit is included, which requires selection of a resistor and a configuration jumper change (JU4) to enable the circuit. Figure 1 is the MAX1763 EV kit schematic for the left side. The right circuit requires a +1.1V to VOUT input voltage range and its +3.3V output supplies up to 1.4A of current. An LDO linear regulator circuit draws power from the +3.3V output and can supply up to 1A of current. The total current drawn from the main output (POUT) and the LDO linear regulator output (VOUT) must not exceed 1.4A. Figure 2 is the MAX1763 EV kit schematic for the right side. The output voltage (POUT) on both circuits can be adjusted for a range of +2.5V to +5.5V with external resistors. Resistors R1 and R2 adjust the left-side POUT voltage, while R9 and R10 adjust the right-side POUT voltage. The input voltage range is from +1.1V to (VPOUT) from a DC source or batteries.
Note: Please indicate that you are using the MAX1763 when contacting these component suppliers.
Quick Start
The MAX1763 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed.
+3.3V Output Low Power (left side)
1) Connect a +1.1V to +3.2V supply to the VIN pad; connect the supply ground to the GND pad. 2) Connect a voltmeter to the left-side POUT pad. 3) Verify that jumpers JU1 (ONB) and JU4 (battery monitor) have shunts across pins 2 and 3 on each jumper. 4) Verify that jumpers JU2 (ONA) and JU3 (CLK/SEL) have shunts across pins 1 and 2 on each jumper. 5) Turn on the power supply and verify that the output (POUT) is +3.3V. For instructions on selecting other output voltages at POUT, see the Evaluating Other Output Voltages at POUT section.
Jumper Selection
The MAX1763 EV kit features jumpers that provide several options, such as shutdown mode, CLK/SEL settings, battery monitor, and LDO linear regulator configurations. Shutdown Mode (MAX1763, left side) The MAX1763 EV kit features a shutdown mode that typically reduces the MAX1763 quiescent current to less than 1A, preserving battery life. The 3-pin jumpers, JU1 and JU2, select the shutdown mode for the MAX1763. Tables 1 and 2 list the selectable jumper options.
+3.3V High-Power Output (right side)
1) Connect a +1.1V to +3.2V supply to the VIN pad; connect the supply ground to the GND pad. 2) Connect a voltmeter to the POUT pad. 3) Verify that jumper JU5 (ONB) has a shunt across pins 2 and 3. 4) Verify that jumpers JU6 (ONA), JU7 (CLK/SEL), and JU8 (LDO) have a shunt across pins 1 and 2 on each jumper. 5) Turn on the power supply and verify that the main output voltage (POUT) is +3.3V. 6) Verify that the LDO linear regulator output voltage (VOUT) is +2.8V. For instructions on selecting other main output voltages (POUT), see the Evaluating Other Output Voltages at POUT section. To evaluate linear output current levels
2
Table 1. Jumper JU1 Function
SHUNT LOCATION 1, 2 2, 3 ONB PIN Connected to POUT Connected to GND MAX1763 OUTPUT Shutdown mode, POUT = VIN - VDIODE MAX1763 enabled, POUT = +3.3V
_______________________________________________________________________________________
VIN POUT
D1
VIN 3.3V C2 100F 6.3V C3 100F 6.3V C8 1.0F PGND
L1 1.5H POUT
+0.7V TO VPOUT
C1 33F 16V
POUT
1 2
ONB
JU1
16 ONB LXN 11
3 LXP POUT 13 15 14
C9 (OPEN)
ONA
1 2
JU2
1 ONA
Figure 1. MAX1763 EV Kit Schematic (left side, QSOP package)
3
U1
POUT
R1 OPEN JU9
MAX1763
OUT 6 1 2
R5 4.7
CLK/SEL
JU3
9 CLK/SEL FD 3 REF A0 8 5
C5 1.0F
R2 SHORT
3
REF JU11
R16 100k
A0
+1.25V C6 0.22F R6 SHORT
2 ISET AIN 7 2 3 JU4 1
JU10 VIN R3 OPEN
C7 OPEN R7 OPEN
GND PGND PGND 10 12 4
Evaluates: MAX1763
_______________________________________________________________________________________
R4 100k 1% PGND
MAX1763 Evaluation Kit
3
Evaluates: MAX1763
MAX1763 Evaluation Kit
Figure 2. MAX1763 EV Kit Schematic (right side, TSSOP-EP package)
POUT
D2 OPEN
4
L2 1.5H POUT 3.3V C12 100F 6.3V PGND JU5
16 ONB LXN 11
VIN
VIN
+1.1V TO VPOUT POUT C13 100F 6.3V C14 1F
C11 33F 16V
1 2 3 LXP POUT 13 15 14
ONB
C19 (OPEN)
ONA
1 2
JU6
1 ONA
3
U2
POUT
MAX1763
OUT 6 1 2
R13 4.7 5% R10 SHORT JU12
R9 OPEN
CLK/SEL
JU7
CLK/SEL FD 3 REF A0 8 5
9
C15 1F
3
REF JU11
R8 20k 5% P1
C18 1F
+1.25V C16 0.22F R14 SHORT
2 ISET AIN 7 2 3 JU8 1
VOUT R11 182k 1% +2.8V C4 68F 10V R12 90.9k 1% C10 1F PGND
C17 OPEN R15 OPEN
GND PGND PGND 10 12 4
_______________________________________________________________________________________
GND
MAX1763 Evaluation Kit Evaluates: MAX1763
Table 2. Jumper JU2 Function
SHUNT LOCATION 1, 2 2, 3 ONA PIN Connected to POUT Connected to GND MAX1763 OUTPUT MAX1763 enabled, VOUT = +3.3V Shutdown mode, POUT = VIN - VDIODE 1, 2
Table 5. Jumper JU4 Function
SHUNT LOCATION AIN PIN Connected to resistor dividers R3, R4 Connected to OUT BATTERY MONITOR Enabled
Table 3. Jumper JU5 and JU6 Functions
JU5 SHUNT LOCATION 2, 3 2, 3 1, 2 1, 2 ONB PIN GND GND POUT POUT JU6 SHUNT LOCATION 2, 3 1, 2 2, 3 1, 2 ONA PIN GND POUT GND POUT MAX1763 OUTPUT On, VOUT = 3.3V On, VOUT = 3.3V Off, VOUT = VIN VDIODE On, VOUT = 3.3V
2, 3
Disabled
Table 6. Jumper JU8 Function
SHUNT LOCATION 1, 2 AIN PIN Connected to resistor dividers R11, R12 Connected to OUT VOUT PAD Linear regulator enabled, VOUT = +2.8V Linear regulator disabled, VOUT = 0V
2, 3
in the 500kHz to 1200kHz range. Table 4 lists the CLK/ SEL jumper options. Battery Monitor Enable (MAX1763, left side) The MAX1763 EV kit low-power side features a shutdown mode for the battery monitor and internal gain block to reduce quiescent current, thus preserving battery life. The 3-pin jumper, JU4, selects the shutdown mode for the battery monitor gain block in the MAX1763. Table 5 lists the selectable jumper options. LDO Linear Regulator Enable (MAX1763, right side) The MAX1763 EV kit high-power side features a shutdown mode for the LDO linear regulator and internal gain block to reduce quiescent current, thus extending battery life. The 3-pin jumper, JU8, selects the shutdown mode for the LDO linear regulator on the MAX1763 EV kit. Table 6 lists the selectable jumper options.
Table 4. Jumpers JU3, JU7 Functions
SHUNT LOCATION 1, 2 CLK/SEL PIN Connected to VOUT Connected to GND MAX1763 OUTPUT Forced PWM mode: PWM operation at all loads Normal mode: PFM at light load and PWM at medium and heavy load PWM mode synchronized to external 500kHz to 1200kHz range clock
2, 3
None
Clock connected to CLK/SEL pad
Shutdown Mode High Power (MAX1763, right side) The MAX1763 EV kit features a shutdown mode that typically reduces the MAX1763 high-power side quiescent current to less than 1A, thus preserving battery life. The 3-pin jumpers, JU5 and JU6, select the shutdown mode for the MAX 1763 high-power side. Table 3 lists the selectable jumper options. CLK/SEL Mode (MAX1763 left and right sides) Jumpers JU3 and JU7 control the CLK/SEL pin operating mode for the left- and right-side circuits, respectively. Options include low noise-forced PWM mode, normal mode, and an external clock source to drive the CLK/SEL pin. The external clock source must operate
Evaluating Other Output Voltages at POUT (left and right sides)
The MAX1763 main outputs (POUT) are set to +3.3V by feedback resistors (R2 and R10). To generate output voltages other than +3.3V (+2.5V to +5.5V), select different external voltage-divider resistors (R1, R2 left side and R9, R10 right side). Refer to the Setting the Output Voltage section in the MAX1763 data sheet for instructions on selecting the resistors.
_______________________________________________________________________________________
5
MAX1763 Evaluation Kit Evaluates: MAX1763
Setting the Battery Monitor Voltage (left side)
Resistor R3 must be installed before enabling the battery monitor jumper JU4. Calculate the resistor value as follows: R3 = R4[(VTH / VREF -1)] where VTH is the desired input trip threshold, VREF is 0.938V, and R4 is 100k as shipped. R4 can range in value up to 270k if desired. Refer to the Gain Block section of the MAX1763 data sheet. See also the Battery Monitor Enable section to enable the battery monitor circuit using jumper JU4. the VOUT pad. This power is obtained from the +3.3V, 1.4A rated POUT circuit. Supplying current from the VOUT pad will diminish the available current at POUT as follows: Available current at POUT = 1.4A - (LDO linear regulator output load current)A
Reconfiguring the LDO Linear Regulator (right side)
The MAX1763 EV kit's LDO linear regulator circuit can be reconfigured, allowing the MAX1763 internal gain block to be utilized for other purposes. The PC board traces shorting across JU11 and JU12 must be cut open, separating the LDO linear regulator circuit. Refer to the LDO Linear Regulator Enable section to disable the MAX1763 gain block with jumper JU8. See also the Gain Block section in the MAX1763 data sheet for instructions on utilizing the gain block for other purposes.
Reconfiguring the Battery Monitor (left side)
The MAX1763 battery monitor circuit can be reconfigured, allowing the MAX1763's internal gain block to be used for other purposes. The PC board traces shorting across JU9 and JU10 must be cut open, separating the battery monitor circuit. Refer to the Battery Monitor Enable section to disable the MAX1763 gain block with jumper JU4. Refer to the Gain Block section in the MAX1763 data sheet for instructions on utilizing the gain block for other purposes.
Linear Output and +3.3V Output Power (right side, VOUT, POUT)
The MAX1763 EV kit's LDO linear regulator (right side), as shipped, can supply +2.8V at up to 1A of current at
6
_______________________________________________________________________________________
MAX1763 Evaluation Kit Evaluates: MAX1763
1.0"
Figure 3. MAX1763 EV Kit Component Placement Guide--Component Side
1.0"
Figure 4. MAX1763 EV Kit Component Placement Guide--Solder Side
_______________________________________________________________________________________
7
MAX1763 Evaluation Kit Evaluates: MAX1763
1.0"
Figure 5. MAX1763 EV Kit PC Board Layout--Component Side
1.0"
Figure 6. MAX1763 EV Kit PC Board Layout--Solder Side
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.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2000 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

▲Up To Search▲

Price & Availability of MAX1763EVKIT

	To Download MAX1763EVKIT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .