64
IC Diagrams
BS
IN
SW
GND
REF
EN
COMP
FB
1
2
3
4
8
7
6
5
TOP VIEW
EXPOSED PAD
ON BACKSIDE
PIN FUNCTIONS
Pin #
Name Description
1
BS
High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET
switch. Connect a 10nF or greater capacitor from SW to BS to power the high-side switch.
2
IN
Power Input. IN supplies the power to the IC, as well as the step-down converter switches.
Drive IN with a 6.5V to 32V power source. Bypass IN to GND with a suitably large capacitor to
eliminate noise on the input to the IC. See
Input Capacitor
.
3
SW
Power Switching Output. SW is the switching node that supplies power to the output. Connect
the output LC filter from SW to the output load. Note that a capacitor is required from SW to BS
to power the high-side switch.
4
GND
Ground. For the MP1591DN, connect the Exposed Pad to pin 4.
5
FB
Feedback Input. FB senses the output voltage to regulate that voltage. Drive FB with a resistive
voltage divider from the output voltage. The feedback threshold is 1.230V. See
Setting the
Output Voltage
.
6
COMP Compensation Node. COMP is used to compensate the regulation control loop. Connect a
series RC network from COMP to GND to compensate the regulation control loop. In some
cases, an additional capacitor from COMP to GND is required. See
Compensation.
7
EN
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN high to turn on the
regulator and low to turn it off. For automatic startup, leave EN unconnected.
8
REF
Reference Output. REF is the 5V reference voltage output. It can supply up to 1mA to external
circuitry. If used, bypass REF to GND with 10nF or greater capacitor. Leave REF unconnected
if not used.
LOCKOUT
COMPARATOR
ERROR
AMPLIFIER
FREQUENCY
FOLDBACK
COMPARATOR
INTERNAL
REGULATORS
1.8V
SLOPE
COMP
CLK
CURRENT
COMPARATOR
CURRENT
SENSE
AMPLIFIER
SHUTDOWN
COMPARATOR
COMP
6
IN
2
EN
7
GND
4
OSCILLATOR
35/330KHz
S
R
Q
SW
3
BS
M1
M2
1
+
REF
5V
8
Q
1.2V
+
+
2.60V/
2.35V
+
1.230V
0.7V
+
+
FB
5
--
--
--
--
--
--
Functional Block Diagram
MP1591, 32V step-down converter
1
3
Pin: 1. Adjust/Ground
2. Output
3. Input
Heatsink tab is connected to Pin 2
1 2 3
Tab
Top View
NCP1117, Low-dropout
Positive Voltage Regulator
BLOCK DIAGRAM
V
SS
V
DD
MCP100
SOT-23-3
RST
RST
OR
Bandgap
Reference
Delay
Circuit
Output
Driver
RESET
V
DD
+
-
Comparator
RESET
or
PINOUT DIAGRAM
MCP100T, Reset
Содержание T1 ToneMatch
Страница 10: ...10 Figure 2 T1 ToneMatch Audio Engine Exploded View ...
Страница 52: ...52 Figure 3 DSP PCB Top Component Layout and Etch Circuit Board Layout Diagrams ...
Страница 53: ...53 Figure 4 DSP PCB Top Component Layout and Power Layer Etch Circuit Board Layout Diagrams ...
Страница 54: ...54 Figure 5 DSP PCB Top Component Layout and Ground Layer Etch Circuit Board Layout Diagrams ...
Страница 55: ...55 Figure 6 DSP PCB Bottom Component Layout and Etch Circuit Board Layout Diagrams ...
