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AMG-PU005

Analog System Base Chip, I/O PowerStage, OP-Amps

厂商名称:Alpha-Micro Electronics

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AMG-PU005
Analog System Base Chip, I/O PowerStage, OP-Amps
1. Functional Description
The AMG-PU005 has both N-channel and P-channel output drivers, a buck and linear
regulator and two OP-AMPs. It is highly suitable as a supply and output stage for many
applications such as MCU power stage, I/O and sensor interface.
2. Features
Supply voltage: 5VDC...36VDC
5V/20mA linear regulator
Adjustable fix frequency buck regulator (8V...34V)
100mA P-channel and N-channel over-current & short-circuit protected open drain outputs
2 LED current sinks 2mA
2 operational amplifiers
Buck & linear regulator may be connected parallel or in a series
Package: QFN24 – Body size: 4mm x 4mm x 0.85mm
RoHS compliant
3. Application
Inductive Proximity Sensor
Optical Switch
Sensor Preamplifier
LED Driver
DC Motor Control
HV Preamplifier
Level Shifter
UART – RS232 Converter
Monoflop
WDT and VDD Monitor
Oscillator
Over current and temperature protection
Audio Amplifier
MCU power stage, I/O and sensor interface
AMG-PU005
Revision: B
9. Nov. 2012
© All rights reserved
Page 1 of 14
AMG-PU005
Analog System Base Chip, I/O PowerStage, OP-Amps
3.1. Example Application Schematic
VL
VDD
FB
LX
Surge
Prot.
VS
VP
5V Linear Reg.
Buck Reg.
AMG-PU005 /
AMGxxxx
R104
HVPS
RSET
Band
gap
Start
up
HVG
Temp
UVLO
DP
PD
Surge
Prot.
Surge
Prot.
DN
ND
VS/VL/VDD
IN1
IN2
IN3
IN4
EncSel
Output
Control
2
LS
OCP
OCP
Bonding Option
or Fuse
D1
D2
GND
OA1P
OA1N
OA2P
OA2N
PGND
OA1O
OA2O
Figure 1: PU005 with basic external circuitry
AMG-PU005
Revision: B
9. Nov. 2012
© All rights reserved
Page 2 of 14
AMG-PU005
Analog System Base Chip, I/O PowerStage, OP-Amps
Table of Contents
1.Functional Description........................................................................................................... 1
2.Features................................................................................................................................. 1
3.Application............................................................................................................................. 1
3.1.Example Application Schematic............................................................................................... 2
4.Block Diagram....................................................................................................................... 4
5.Block Descriptions................................................................................................................. 5
5.1.Output Control - Logic Table.....................................................................................................5
5.2.Over Current Protection (OCP) Block...................................................................................... 5
5.3.Level Shifter (LS)...................................................................................................................... 5
5.4.High Voltage Power Supply (HVPS)........................................................................................ 5
5.5.Under Voltage Lock Out (UVLO).............................................................................................. 5
5.6.Over-Temperature Protection Block (Temp).............................................................................5
5.7.Buck Regulator......................................................................................................................... 5
5.8.5V Linear Regulator................................................................................................................. 6
5.9.Open Drain Drivers................................................................................................................... 6
5.10.LED Current-Sink Blocks........................................................................................................6
5.11.OP-Amp Blocks...................................................................................................................... 6
6.Pinning................................................................................................................................... 6
7.Absolute Maximum Ratings................................................................................................... 8
8.Electrical Characteristics........................................................................................................ 8
8.1.Operational Range................................................................................................................... 8
8.2.DC Characteristics................................................................................................................... 9
8.3.AC Characteristics.................................................................................................................. 10
8.4.Application Notes.................................................................................................................... 11
9.IC-Package.......................................................................................................................... 12
9.1.QFN24 – Quad Flat No-leads Package, 24 leads, RoHS compliant......................................12
10.IC-Marking......................................................................................................................... 13
11.Ordering Information.......................................................................................................... 13
12.Notes and Cautions........................................................................................................... 13
12.1.ESD Protection..................................................................................................................... 13
12.2.Storage conditions................................................................................................................ 14
13.Disclaimer.......................................................................................................................... 14
14.Contact Information............................................................................................................ 14
AMG-PU005
Revision: B
9. Nov. 2012
© All rights reserved
Page 3 of 14
AMG-PU005
Analog System Base Chip, I/O PowerStage, OP-Amps
4. Block Diagram
VL
VDD
FB
LX
5V Linear Reg.
Buck Reg.
AMG-PU005
VS
RSET
Band
gap
Start
up
HVPS
HVG
Temp
UVLO
DP
IN1
IN2
IN3
IN4
Output
Control
2
LS
OCP
OCP
DN
D1
D2
GND
OA1P
OA1N
OA2P
OA2N
PGND
OA1O
OA2O
Figure 2: Block Diagram
AMG-PU005
Revision: B
9. Nov. 2012
© All rights reserved
Page 4 of 14
AMG-PU005
Analog System Base Chip, I/O PowerStage, OP-Amps
5. Block Descriptions
5.1. Output Control - Logic Table
Inputs
IN1
1
0
1
0
1
0
1
0
ON
OFF
ON
OFF
ON
OFF
IN2
IN3
IN4
LS
HS
Outputs
LD1
LD2
ON
OFF
5.2. Over Current Protection (OCP) Block
The OCP block prevents the N- and P-Driver open drain outputs from driving disruptive
currents.
5.3. Level Shifter (LS)
Internal level shifter to translate switching signals from the low voltage domain to the high
voltage domain. It is dedicated to drive the open drain P-Driver gate.
5.4. High Voltage Power Supply (HVPS)
The HVPS supplies the level shifter block with the high voltage needed to drive the open drain
P-Driver gate. It supplies even the N-Driver's protection circuit and the buck regulator's driver
stage.
5.5. Under Voltage Lock Out (UVLO)
The UVLO block detects under-voltage events on VDD and disables the outputs in case of
such event. This prevents the IC from under-voltage driven malfunctions.
5.6. Over-Temperature Protection Block (Temp)
The Temp block prevents the IC from thermal overload. In case of such overload the outputs
will be switched off.
5.7. Buck Regulator
This block allows to build an efficient step-down DC-DC converter. Depending on the load it
supports continuous current mode, discontinuous current mode and cycle skipping mode. The
Buck Regulator is over-current and short circuit protected.
AMG-PU005
Revision: B
9. Nov. 2012
© All rights reserved
Page 5 of 14
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