ZSPM1025A Datasheet, PDF (11/45 Pages) List of Unclassifed Manufacturers – True Digital PWM Controller (Single-Phase, Single-Rail)

ZSPM1025A Datasheet
2 Product Summary
2.1. Overview
The ZSPM1025A is a flexible true-digital single-phase PWM controller optimally configured for use with the
Murata Power Solutions 25A Power Block OKLP-X/25-W12-C in smart digital power solutions. It offers a
PMBus™-configurable digital power control loop, incorporating output voltage sensing and average inductor
current sensing, bundled with extensive fault monitoring and handling options.
Several different functional units are integrated in the device. A dedicated digital control loop is used to provide
fast loop response and optimal output voltage regulation. This includes output voltage sensing, average inductor
current sensing, a digital control law, and a digital pulse-width modulator (DPWM). In parallel, a dedicated,
configurable error handler allows for fast and flexible detection of error signals and their appropriate handling. A
housekeeping analog-to-digital converter (HKADC) ensures the reliable and efficient measurement of
environmental signals, such as input voltage and temperature. An application-specific, low-energy integrated
microcontroller is used to control the overall system. Among other things, it manages configuration of the various
logic units and handles the PMBus™ communication protocol. A PMBus™/SMBus/I²C™ interface is incorporated
to connect with the outside world; supported by control and power-good signals.
Figure 2.1 Typical Application Circuit with a 5V Supply Voltage
+5V
C1,C2,C3
R1
C4,C5,C6
R2,R3
PMBus™
Interface
VDD50
VDD33
VDD18
GND
Vin
+5V
AVDD18
VREFP
ADCVREF
AGND
ADDR0
ADDR1
VIN
PWM
LSE
SCL
SDA
SMBALERT
GPIO0
CONTROL
PGOOD
TEMP
ISNSP
ISNSN
VFBP
VFBN
ZSPM1025A
R7
R8
+5V ENABLE
VIN
PWM
Murata
VOUT
OKLP-X/25-W12-C
CIN
GND
TEMP +CS -CS
GND
C8
R6
C7
R4 ^R5
+Vout
COUT
PGND
© 2016 Integrated Device Technology, Inc.
11
January 25, 2016