MAX1685EVKIT Maxim Integrated, MAX1685EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX1685EVKIT
• Description: Power Management IC Development Tools Evaluation Kit for the MAX1684 MAX1685
• Manufacturer: Maxim Integrated
• Series: MAX1684, MAX1685r

Specifications of MAX1685EVKIT

• Output Voltage: 3.3 V
• Output Current: 1 A

The MAX1685 EV kit is fully assembled and tested.
Follow these steps to verify board operation. Do not
turn on the power supply until all connections are
completed.
1) Connect a +3.5V to +14V supply to the VIN pad.
2) Connect a voltmeter and load (if any) to the VOUT
3) Verify that the shunt is across JU1 pins 1 and 2.
4) Turn on the power supply and verify that the output
The MAX1685 EV kit features a shutdown mode that
reduces the MAX1685’s quiescent current to 2µA, pre-
serving battery life. The 3-pin header, JU1, selects the
shutdown mode (Table 1).
MAX1685 Evaluation Kit
Figure 1. MAX1685 EV Kit Schematic
2
Connect ground to the GND pad.
pad.
is at +3.33V.
_______________________________________________________________________________________
SYNC/PWM
SHDN
STBY
VIN
3.5V TO 14V
VL
VL
Detailed Description
100k
R4
JU3
JU2
Jumper Selection
VIN
22 F
Quick Start
JU1
35V
100k
C1
R3
Shutdown Mode
1
3
2
C4
0.1 F
0.1 F
C9
C5
0.1 F
C6
0.01 F
11
10
15
9
6
2
8
SYNC/PWM
AIN
SHDN
STBY
REF
ILIM/SS
CC
IN
3
MAX1685
AGND
5
CVH
The MAX1685 operates in one of four modes to opti-
mize performance: a fixed-frequency (PWM) mode
switches at a fixed frequency for easy postfiltering; a
low-power standby mode; a synchronizable PWM mode
that uses an external clock to minimize harmonics; and
a normal mode that extends battery life by operating in
PWM mode under heavy loads and PFM mode under
light loads to reduce power consumption.
Table 1. Jumper JU1 Functions
U1
1
LOCATION
C3
0.1 F
PGND
SHUNT
BOOT
CVL
1 & 2
2 & 3
LX
LX
FB
13
14
16
12
7
4
D1
JU4
C7
1 F
16V
Connected to VIN
Connected to GND
VOUT
10 H
SHDN PIN
L1
1
3
2
VL
C8
OPEN
C2
100 F
10V
MAX1685 enabled,
V
Shutdown mode,
V
OUT
OUT
R1
OPEN
R2
SHORT
(PC TRACE)
Operating Mode
MAX1685
OUTPUT
= +3.33V
= 0
+3.33V
V
OUT