MAX1748EVKIT Maxim Integrated Products, MAX1748EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX1748EVKIT
• Description: Power Management Modules & Development Tools MAX1748 EVAL KIT MAX1748 EVAL KIT
• Manufacturer: Maxim Integrated Products

Specifications of MAX1748EVKIT

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MAX1748 Evaluation Kit
The MAX1748 EV kit is fully assembled and tested.
Perform the following steps to verify board operation for
a +10V output. Do not turn on the power supply until
all connections are completed:
1) Connect a +2.7VDC to +5.5VDC power supply to
2) Connect a voltmeter to the V1 pad.
3) Verify that shunts JU1 (SHDN) are across pins
4) Turn on the power supply and verify that the main
5) Verify that the negative charge-pump regulator out-
6) Verify that the positive charge-pump regulator out-
For instructions on selecting the feedback resistors for
other output voltages, see the Output Voltage Selection
section. The input voltage range is +2.7V to +5.5V
when selecting the output voltage.
The MAX1748 EV kit contains a boost switching regula-
tor and two regulating charge pumps. The EV kit oper-
ates from a +2.7V to +5.5V input voltage range. The
boost switching regulator provides up to 200mA with a
+10V output.
The positive charge-pump regulator generates a +15V
output and can provide >20mA of current. The negative
charge-pump regulator generates -5V output and can
provide >20mA of current. Jumper options allow either
charge pump to be fed power from PIN or V1.
2
DESIGNATION
JU1, JU4, JU5
_______________________________________________________________________________________
the PIN pad. Connect the supply ground to the
GND pad.
1 and 2 and that shunts JU4 (SUPP) and JU5
(SUPN) are across pins 2 and 3.
output (V1) is +10V.
put (VN) is -5V.
put (VP) is +15V.
R8, R9
None
None
None
None
R7
U1
Component List (continued)
QTY
0
2
1
3
3
1
1
1
Detailed Description
Not installed (0805)
1MΩ ±5% resistors (0805)
MAX1748EUE (16-pin TSSOP)
3-pin headers
Shunts (JU1, JU4, JU5)
MAX1748 PC board
MAX1748 data sheet
MAX1748 EV kit data sheet
DESCRIPTION
Quick Start
The boost switching-regulator output voltage can be
adjusted from +2.7V to +13V with resistors. The positive
charge-pump regulator’s output can be adjusted up to
+25V, and the negative regulator can be adjusted to
-15V with resistors.
The MAX1748 EV kit charge-pump circuits feature PC
board pads for a positive voltage tripling and negative
voltage doubling output circuits. The MAX1748 EV kit
can evaluate the MAX1779 IC after replacing several
components. See the Evaluating the MAX1779 section.
The MAX1748 EV kit features a shutdown mode that
reduces the MAX1748 quiescent current, preserving
battery life. The 3-pin jumper (JU1) selects the shut-
down mode for the MAX1748. Table 1 lists the selec-
table jumper options.
In the MAX1748 EV kit, jumper JU2 selects which posi-
tive charge pump will be regulated: VP, a voltage dou-
bler, or VPA, a voltage tripler. Table 2 lists the positive
charge-pump regulator jumper options.
In the MAX1748 EV kit, jumper JU3 selects which nega-
tive charge pump will be regulated: VN or VNA, a volt-
age doubler. Table 3 lists the negative regulator jumper
options.
The MAX1748 EV kit features an option to choose which
voltage source feeds the positive charge-pump regula-
tor circuit. Jumper JU4 selects the input voltage source
for the MAX1748’s SUPP pin. Table 4 lists the options.
Note: Please indicate that you are using the MAX1748/MAX1779
when contacting these component suppliers.
Coilcraft
Fairchild
Murata
Sprague
Sumida
Taiyo Yuden
Toshiba
SUPPLIER
Negative Charge-Pump Regulator Feedback
Positive Charge-Pump Regulator Feedback
Component Suppliers
847-639-6400
408-822-2000
814-237-1431
603-224-1961
708-956-0666
408-573-4150
949-455-2000
PHONE
Positive Voltage Source
Jumper Selection
Shutdown Mode
847-639-1469
408-822-2102
814-238-0490
603-224-1430
708-956-0702
408-573-4159
949-859-3963
FAX