BQ25504 Datasheet, PDF (5/24 Pages) Texas Instruments – Ultra Low Power Boost Converter with Battery Management for Energy Harvester Applications

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DEVICE INFORMATION
RGT PACKAGE
(TOP VIEW)
16
LBST
1 VSS
15 ^`
VSTOR
14
VBAT
13
VSS
AVSS 12
2 _{VIN_DC}
VBAT_OK 11
bq25504
3 VOC_SAMP
OK_PROG 10
4 ^VREF_SAMP
OK_HYST ₉
OT_PROG VBAT_OV VRDIV VBAT_UV
5
6
7
8
Figure 1. bq25504 3mm x 3mm QFN-16 Package
bq25504
SLUSAH0 – OCTOBER 2011
PIN
NO. NAME
1 VSS
2 VIN_DC
3 VOC_SAMP
4 VREF_SAMP
5 OT_PROG
6 VBAT_OV
7 VRDIV
8 VBAT_UV
9 OK_HYST
10 OK_PROG
11 VBAT_OK
12 AVSS
13 VSS
14 VBAT
15 VSTOR
16 LBST
I/O TYPE
Input
Input
Input
Input
Input
Input
Output
Input
Input
Input
Output
Supply
Supply
I/O
Output
Input
PIN FUNCTIONS
DESCRIPTION
General ground connection for the device
DC voltage input from energy harvesters
Sampling pin for MPPT network. To disable MPPT, connect to VSTOR
Switched node for holding the reference set by resistors on VOC_SAMP for MPPT. When MPPT is
disabled, input for reference voltage
Digital Programming input for overtemperature threshold
Resistor divider input for over voltage threshold
Resistor divider biasing voltage.
Resistor divider input for under voltage threshold
Resistor divider input for VBAT_OK hysteresis threshold
Resistor divider input for VBAT_OK threshold
Digital battery good indicator referenced to VSTOR pin
Signal ground connection for the device
General ground connection for the device
Connection for storage elements
Connection for the system load, output of the boost converter
Inductor connection for the boost converter switching node
Copyright © 2011, Texas Instruments Incorporated
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