DC1387A - Demo Manual

DEMO C IR C U IT 1 3 8 7
Q U IC K S TA R T G U IDE
U ltra lo w P o w e r B o o s t C o n v e rte rs w ith Ou tp u t Dis c o n n e c t
DESCRIPTION
Demonstration circuits 1387A-A, and –B are Ultralow
Pow er Boost Converters w ith Output Disconnect featuring the LT8410 and LT8410-1 . Both versions convert a
3V-10V source to 16V. The –A version supplies 1.6mA at
3Vin and the -B supplies 0.5mA.
Both versions feature a low noise control scheme, integrated schottky diode and output disconnect function,
ultra-low quiescent current, built in soft-start and overvoltage protection. The LT8410 datasheet gives a complete description ofthe parts, their operation and application information. The datasheet must be read in conjunction w ith this quick start guide for w orking on or modifying the demo circuit 1387.
These circuits are intended for space-conscious applications such as Sensor Pow er, RF M ems and GeneralPurpose Bias Supplies.
Design files for this circuit board are available. Call
the LTC factory.
L, LTC, LTM , LT are registered trademarks ofLinear Technology Corporation.
PERF ORM ANCE SU M M ARY F OR DC13 87 A-A/L T84 10
SYM BOL
VIN
VOUT
VOUT
PARAM ETER
Input Supply Range
Output Voltage Range
Output Voltage Range
RIPPLE
EFFICIENCY
EFFICIENCY
CONDITIONS
VIN = 3V, ILOAD = 1.6mA
VIN = 10V, ILOAD = 10mA
VIN = 10V, ILOAD = 10mA
VIN = 3V, ILOAD = 1.6mA
VIN = 10V, ILOAD = 10mA
Specifications are atTA = 25°C
M IN
3
15.54
15.54
TYP
16
16
20
73
83
M AX
10
16.48
16.48
UNITS
V
V
V
mV
%
%
PERF ORM ANCE SU M M ARY F OR DC13 87 A-B/L T84 10 -1 Specifications are atTA =
25°C
SYM BOL
VIN
VOUT
VOUT
RIPPLE
EFFICIENCY
EFFICIENCY
PARAM ETER
Input Supply Range
Output Voltage Range
Output Voltage Range
CONDITIONS
VIN = 3V, ILOAD = 0.5mA
VIN = 10V, ILOAD = 3mA
VIN = 10V, ILOAD = 3mA
VIN = 3V, ILOAD = 0.5mA
VIN = 10V, ILOAD = 3mA
M IN
3
15.52
15.52
TYP
16
16
10
69
83
M AX
10
16.48
16.48
UNITS
V
V
V
mV
%
%
1
Q U ICK START PROCEDU RE
Demonstration circuit 1387 is easy to set up to evaluate
the performance of the LT8410 and LT8410-1. Refer to
Figure 1 for proper measurement equipment setup and
follow the procedure below :
2. W ith pow er off, connect the input pow er supply to
Vin and G N D.
3. Turn on the pow er at the input.
Check for the proper output voltages. Vout = 15.52V to 16.48V.
NOTE. W hen measuring the input or output voltage ripple, care must be
taken to avoid a long ground lead on the oscilloscope probe. M easure the
input or output voltage ripple by touching the probe tip directly across the
Vin or Vout and GND terminals. See Figure 2 for proper scope probe
technique.
NOTE. Ifthere is no output, temporarily disconnect the load to make sure
that the load is not set too high.
4. O nce the proper output voltage is established, adjust the load w ithin the operating range and observe the output voltage regulation, ripple voltage,
efficiency and other parameters.
1. Place jumpers in the follow ing positions:
JP1 Run
Figure 1. Proper M easurem entEquipm entSetup
GND
VIN
Figure 2. M easuring Inputor outputRipple
2
3
Similar pages