ZSPM4011B Datasheet, PDF (1/21 Pages) List of Unclassifed Manufacturers – High Efficiency 1A Synchronous Buck Converter

High Efficiency 1A Synchronous
Buck Converter
ZSPM4011B
Datasheet
Brief Description
The ZSPM4011B is a DC/DC synchronous
switching regulator with fully integrated power
switches, internal compensation, and full fault
protection. The 1MHz switching frequency enables
using small filter components, resulting in reduced
board space and reduced bill-of-materials costs.
The ZSPM4011B utilizes current mode feedback in
normal regulation pulse-width modulation (PWM)
mode. When the regulator is disabled (EN pin is
low), the ZSPM4011B draws less than 10µA quies-
cent current.
The ZSPM4011B integrates a wide range of
protection circuitry, including input supply under-
voltage lockout, output voltage soft start, current
limit, V_OUT over-voltage, and thermal shutdown.
The ZSPM4011B includes supervisory reporting
through the PG (Power Good) open drain output to
interface other components in the system.
Features
• Output voltage options (depends on order code):
 Fixed output voltages: 1.5V, 1.8V, 2.5V,
3.3V, or 5V with +/- 2% output tolerance
 Adjustable output voltage range: 0.9V to
5.5V with +/- 1.5% reference
• Wide input voltage range: 4.5V to 24V
• 1MHz +/- 10% fixed switching frequency
• 1A continuous output current
• High efficiency – up to 95%
• Current mode PWM control with pulse-
frequency modulation (PFM) mode for
improved light load efficiency
• Voltage supervisor for V_OUT reported at the PG
pin
• Input supply under voltage lockout
• Soft start for controlled startup with no
overshoot
• Full protection for over-current, over-
temperature, and V_OUT over-voltage
• Less than 10µA in Disabled Mode
• Low external component count
Benefits
• Increased battery life
• Minimal external component count
(3 capacitors, 1 inductor)
• Inherent fault protection and reporting
Available Support
• Evaluation Kit
• Documentation
Physical Characteristics
• Junction operating temperature -40°C to 125°C
• Packaged in a 16pin QFN (3x3mm)
Related IDT Products
• ZSPM4012B/ZSPM4013B: 2A/3A synchronous
buck converters, available with adjustable out-
put from 0.9 to 5.5V or fixed output voltages at
1.5V, 1.8V, 2.5V, 3.3V, 5.0V
(16-pin 3x3 QFN)
• ZSPM1000: >5A single-phase, single-rail, true
digital PWM controller (24-lead 4x4mm QFN)
ZSPM4011B Application Circuits
VCC
CBYPASS
EN
Adjustable Output
BST
VCC
VSW
CBST
LOUT
FB
EN
RTOP
RBOT
VOUT
COUT
VOUT
10 kΩ
(optional)
PG
PG
VCC
CBYPASS
EN
Fixed Output
BST
VCC
VSW
CBST
LOUT
VOUT
COUT
FB
VOUT
EN
10kΩ
(optional)
PG
PG
© 2016 Integrated Device Technology, Inc.
1
January 27, 2016