19-2089; Rev 0; 7/01
MAX1708 Evaluation Kit
General Description
The MAX1708 evaluation kit (EV kit) is a step-up DC-DC
switching regulator for 1- to 3-cell battery inputs as well
as +2.5V or +3.3V regulated supply inputs. The EV kit
accepts a positive input between 0.7V and V
OUT
, and
converts it to a higher, pin-selectable output voltage.
Efficiency is up to 90% with output load currents to 2A.
This EV kit operates at fixed 600kHz PWM frequency,
allowing the use of a small inductor.
A movable jumper on the EV kit selects either a +3.3V
or +5V output voltage. Additional pads on the board
accommodate the resistors for output adjustment. This
EV kit uses surface-mount components and is fully
assembled and tested for quick evaluation.
o
0.7V to V
OUT
Input Voltage Range
o
Pin-Selectable +3.3V or +5V Output Voltage (+5V
as Shipped)
o
Adjustable Output Voltage (+2.5V to +5.5V,
External Divider)
o
Up to 2A Output Current
o
600kHz PWM Operation
o
Internal 5A MOSFET Switch
o
1碌A(chǔ) IC Shutdown Current
o
Surface-Mount Components
o
Fully Assembled and Tested
Features
Evaluates: MAX1708
Ordering Information
PART
MAX1708EVKIT
TEMP RANGE
0擄C to +70擄C
IC PACKAGE
16 QSOP
Component List
DESIGNATION
C1, C4
QTY
0
DESCRIPTION
Not installed (D case)
150碌F, 6.3V low-ESR capacitor (D
case)
Sanyo 6TPB150M or
Panasonic EEFUE0J151R
150碌F, 6.3V 15m鈩?low-ESR
capacitor (D case)
Panasonic EEFUE0J151R
0.1碌F ceramic capacitors (1206)
0.22碌F ceramic capacitor (1206)
1碌F, 16V ceramic capacitor (1206)
Taiyo Yuden EMK316BJ105KL
or TDK C3216X7R1C105M
5A Schottky diode (SMC case)
Central Semiconductor
CMSH5-20 or CMSH5-40
DESIGNATION
QTY
DESCRIPTION
2.2碌H power inductor
Coilcraft DO3316P-222HC
(unshielded) or Coiltronics UP2B-
2R2 (unshielded) or
Sumida CDRH104R-2R5
(2.5碌H, shielded)
Not installed (1206)
Not installed, (short PC trace)
(1206)
2鈩?鹵5% resistor (1206)
1M鈩?鹵5% resistors (1206)
MAX1708EEE (16-pinQSOP)
2-pin headers
Shunts
MAX1708 PC board
MAX1708 EV kit data sheet
MAX1708 data sheet
C2
1
L1
1
C3
C5, C6, C10
C7
C8
1
3
1
1
R1, R3
R2
R4
R5鈥揜8
U1
JU1, JU2, JU3
None
None
None
None
0
0
1
4
1
3
3
1
1
1
D1
1
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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