SP6659EB Datasheet, PDF (2/3 Pages) Sipex Corporation – Evaluation Board Manual

USING THE EVALUATION BOARD
1) Powering up the SP6659 Circuit
The SP6659 Evaluation Board can be powered from a single Li-Ion battery or a +2.5 to
+5.5V power supply. Connect with short leads directly to the “Vin” and “Gnd” posts.
Note the SP6659 will remain in “shutdown” until the “RUN” Jumper J1 is applied to the
Vin or position 1 to 2.
2) VOUT PROGRAMMING
The SP6659 has a dynamically programmable output voltage using 2 feedback resistors
to control the output voltage:
R1
=


Vout
0.6
−
1

•
R2
OR
Vout
=
0.61 +
R1 _
R2 _
Table 1. SP6659EB BILL OF MATERIALS
Ref.Des. Qty Manufacturer
Part Number
Size
Component
Vendor
Eval bd 1 Sipex Corp
146-6595-00
1"x1.5"
SP6659 Eval board
Sipex 408-937-7500
U1 1 Sipex Corp
SP6659
SOT23-5 5 pins SOT23 DC/DC Conv Sipex 408-937-7500
Cin 1 Murata GRM188R60J475KE19D 0603
Ceramic 4.7uF 6.3V X5R
murata.com
Cout 1 Murata GRM21BR60J106KE19 0805
Ceramic 10uF 6.3V X5R
murata.com
Cf 1 Murata GRM1885C1H101JA01B 603
Ceramic 100pF 50V COG
murata.com
L1 1 Murata
LQH32CN2R2M53K 1210 2.2uH 790mA 97mΩ 1.5mm thick
murata.com
R1 1
Vishay
CRCW06032003F
0603
200KΩ, 1/10W, 1%
vishay.com
R2 1
Vishay
CRCW06031003F
0603
100KΩ, 1/10W, 1%
vishay.com
J1
1
Sullins
PTC36SAAN
.23x.12
3 Pin Header
800-digi-key
1
Sullins
STC02SYAN
.2x.1
Shunt
800-digi-key
TP 3 Mill-Max 0300-115-01-4727100 .042" dia
Test Point Female Pin
800-digi-key
Table 2. SP6659 PIN ASSIGNMENT
Pin Name
Pin Description
Pin
#
RUN
Power down control pin. Forcing this pin above 1.5V enables the
device. Forcing this pin below 0.3V shuts down the device.
1
GND Ground pin
2
SW Switching node
3
V_in
Power supply pin
4
V_FB
Feedback. Receives the feedback voltage from an external
resistive divider across output.
5
2