19-2894; Rev 1; 4/04
MAX1573 Evaluation Kit
General Description
Features
The MAX1573 evaluation kit (EV kit) is a fully assembled
and tested surface-mount circuit board. The EV kit con-
tains the MAX1573, a white LED driver with a high-effi-
ciency charge pump. The EV kit accepts a 2.7V to 5.5V
input voltage and drives up to 4 white LEDs with regu-
lated constant current for uniform intensity. The
MAX1573 runs at 1MHz fixed frequency, allowing tiny
external components. An EV kit is available for both the
UCSP and the TQFN packages.
ꢀ Proprietary Adaptive 1x/1.5x Modes
ꢀ High Efficiency (P
/ P
), Up to 92%
BATT
LEDs
ꢀ 2% LED Current Matching
ꢀ 28mA/LED Drive Capability
ꢀ Eliminates Ballast Resistor
ꢀ Low 0.1µA Shutdown Current
ꢀ 2.7V to 5.5V Input Voltage Range
ꢀ Tiny 2.1 x 2.1 x 0.6mm UCSP Package
ꢀ Surface-Mount Components
Component List
DESIGNATION QTY
DESCRIPTION
1µF 10ꢀ% 6ꢁ3V X5ꢂ ꢃceramꢃ
ꢃrprꢃmtoes (0603)
ꢀ Fully Assembled and Tested
C1–C4
4
TDK C1608X5ꢂ0J105K
Suefrꢃc-aount whmtc LEDs
Nmꢃhmr NSCW215T
D1–D4
4
Ordering Information
JU1% JU2
JU3
2
1
1
1
2
1
3-pmn hcrdces
PART
TEMP RANGE
0°C to +70°C
0°C to +70°C
IC PACKAGE
14 UCSP 4 x 4
16 TQFN
Not mnstrllcd
MAX1573EVKIT
MAX1573TQFNEVKIT
ꢂ1
7ꢁ5kΩ 1ꢀ ecsmstoe (0603)
MAX1573EBE oe MAX1573ETE
Shunts
U1
Nonc
Nonc
MAX1573EVKIT PC bored
Component Suppliers
SUPPLIER
COMPONENT
LEDs
PHONE
WEBSITE
wwwꢁnmꢃhmrꢁꢃoa
Nmꢃhmr
717-285-2323
714-373-7366
408-573-4150
888-835-6646
Prnrsonmꢃ
Trmyo Yudcn
TDK
ꢂcsmstoes
wwwꢁarꢃoꢁprnrsonmꢃꢁꢃoꢁjp
wwwꢁt-yudcnꢁꢃoa
Crprꢃmtoes
Crprꢃmtoes
wwwꢁꢃoaponcntꢁtdkꢁꢃoa
Note: Please indicate that you are using the MAX1573 when contacting these suppliers.
1) Verify that shunts are across pins 1 and 2 of JU1
(EN1) and JU2 (EN2).
Quick Start
Recommended Equipment
2) Preset the power supply to 2.7V and turn off.
For evaluation of either EV kit:
3) Connect the positive lead of the power supply to the
VIN pad on the EV kit board. Connect the ground
lead of the power supply to the GND pad directly
below the VIN pad.
• Variable-output power supply capable of supplying
up to +5.5V at 300mA
Procedure
The MAX1573 EV kit is fully assembled and tested.
Perform the following steps to verify board operation.
Do not turn on the power supply until all connec-
tions are completed:
4) Turn on the power supply.
5) Verify that all 4 white LEDs are on with uniform
intensity.
UCSP is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.