ZSPM4022AA1W09 datasheet, PDF - EEWORLD Datasheet

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ZSPM4022AA1W09: DescriptionVFQFPN-28, Reel; CategoryPower/power management The power supply circuit; File Size1MB，37 Pages; ManufacturerIDT (Integrated Device Technology); Environmental Compliance

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ZSPM4022AA1W09 Overview

VFQFPN-28, Reel

ZSPM4022AA1W09 Parametric

Parameter Name	Attribute value
Brand Name	Integrated Device Technology
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	IDT (Integrated Device Technology)
Parts packaging code	VFQFPN
Contacts	28
Manufacturer packaging code	NVG28
Reach Compliance Code	compli
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
JESD-609 code	e3
Humidity sensitivity level	2
Peak Reflow Temperature (Celsius)	260
Terminal surface	Tin (Sn)
Maximum time at peak reflow temperature	NOT SPECIFIED
Base Number Matches	1

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12V/9A Synchronous DC/DC Buck

Regulator

ZSPM4022-09

Datasheet

Brief Description

The ZSPM4022-09 is a constant-frequency, syn-

chronous DC/DC buck regulator featuring adaptive

on-time control architecture. The ZSPM4022-09

operates over a 4.5V to 19V supply range (12V typi-

cal). It has an internal linear regulator that provides a

regulated 5V to power the internal control circuitry.

The ZSPM4022-09 operates at a constant 600kHz

(typical) switching frequency in continuous-

conduction mode and can be used to provide up to

9A of output current. The output voltage is adjust-

able from 5.5V down to 0.8V.

Under medium to heavy loads, the ZSPM4022-09

provides high efficiency and ultra-fast transient res-

ponse via its rapid-control architecture. Under light

load conditions, it maintains high efficiency and a

superior transient response by transitioning to

variable-frequency, discontinuous mode operation

with its ultra-light-load architecture.

The ZSPM4022-09 offers a full suite of protection

features to ensure protection of the IC during fault

conditions. These include under-voltage lockout to

ensure proper operation under power-sag con-

ditions; thermal shutdown; internal soft-start to

reduce inrush current; foldback current limiting; and

“hiccup” mode short-circuit protection. The

ZSPM4022-09 includes a power good (PG) output to

allow simple sequencing.

Benefits

•

Ultra-light load efficiency – up to 80% at 10mA

Up to 95% efficiency

Feedback reference accuracy as high as ±1%

Features

•

Rapid-control architecture enables operation with

a high input/output voltage ratio (e.g., V

= 19V

and V

OUT

= 0.8V) and small output capacitance

Adjustable output voltage from 0.8V to 5.5V

Universally compatible with most output

capacitors—stable with zero to high ESR

Power good (PG) output

Foldback current limiting and “hiccup” mode

short-circuit protection

Safe start-up into pre-biased loads

Available Support

•

Evaluation Kit

Support documentation

Physical Characteristics

•

Input voltage range: 4.5V to 19V

Output current: up to 9A

Switching frequency: 600kHz

Junction temperature: –40°C to +125°C

28-pin 5mm

6mm QFN package

Efficiency (VIN = 12V)

vs. Output Current

100

5.0V

3.3V

2.5V

1.8V

1.5V

1.2V

1.0V

0.9V

0.8V

ZSPM4022-09 Typical Application

EFFICIENCY (%)

VIN = 12V

OUTPUT CURRENT (A)

January 25, 2016

ZSPM4022-09 Datasheet

Contents

List of Figures .......................................................................................................................................................... 4

List of Tables ........................................................................................................................................................... 4

1 IC Characteristics ............................................................................................................................................. 5

1.1. Absolute Maximum Ratings ....................................................................................................................... 5

1.2. Operating Conditions ................................................................................................................................. 5

1.3. Electrical Parameters ................................................................................................................................ 6

1.4. Typical Characteristics .............................................................................................................................. 8

1.5. Functional Characteristics ....................................................................................................................... 12

2 Functional Description .................................................................................................................................... 15

2.1. Overview .................................................................................................................................................. 15

2.2. Pin Configuration and Description ........................................................................................................... 16

2.3. Theory of Operation ................................................................................................................................. 18

2.3.1. Continuous Mode .............................................................................................................................. 18

2.3.2. Discontinuous Mode ......................................................................................................................... 21

2.3.3. VDD Regulator .................................................................................................................................. 22

2.3.4. Soft–Start .......................................................................................................................................... 22

2.3.5. Current Limit...................................................................................................................................... 22

2.3.6. Power Good (PG).............................................................................................................................. 23

2.3.7. Internal MOSFET Gate Driver ........................................................................................................... 23

3 Application Information ................................................................................................................................... 24

3.1. External Component Selection ................................................................................................................ 24

3.1.1. Inductor Selection ............................................................................................................................. 24

3.1.2. Output Capacitor Selection ............................................................................................................... 25

3.1.3. Input Capacitor Selection .................................................................................................................. 26

3.1.4. Ripple Injection.................................................................................................................................. 27

3.1.5. Setting the Output Voltage ................................................................................................................ 30

3.2. Thermal Measurements ........................................................................................................................... 31

4 Mechanical Specifications .............................................................................................................................. 32

4.1. Package Dimensions ............................................................................................................................... 32

4.2. Recommended Land Pattern................................................................................................................... 33

5 PCB Layout Guidelines .................................................................................................................................. 34

5.1. ZSPM4022-09.......................................................................................................................................... 34

5.2. Input Capacitor ........................................................................................................................................ 34

5.3. Inductor .................................................................................................................................................... 34

5.4. Output Capacitor ..................................................................................................................................... 35

5.5. Optional RC Snubber .............................................................................................................................. 35

6 Ordering Information ...................................................................................................................................... 35

7 Related Documents ........................................................................................................................................ 35

8 Glossary ......................................................................................................................................................... 36

9 Document Revision History ............................................................................................................................ 36

January 25, 2016

ZSPM4022-09 Datasheet

List of Figures

Figure 2.1

Figure 2.2

Figure 2.3

Figure 2.4

Figure 2.5

Figure 2.6

Figure 2.7

Figure 3.1

Figure 3.2

Figure 3.3

Figure 3.4

Figure 3.5

Figure 4.1

Functional Diagram ........................................................................................................................... 15

Typical Application Circuit ................................................................................................................. 16

Pin Configuration 28-Pin 5mm

6mm QFN (JL)—Top View ........................................................... 16

ZSPM4022-09 Control Loop Timing –Continuous Mode ................................................................. 20

ZSPM4022-09 Load Transient Response ....................................................................................... 20

ZSPM4022-09 Control Loop Timing –Discontinuous Mode ............................................................ 21

ZSPM4022-09 Current–Limit Foldback Characteristic ..................................................................... 22

Feedback Circuit if Sufficient Ripple is Present at FB for Stable Operation ..................................... 28

Ripple Injection Circuit for Supplementing Inadequate Ripple at FB to Prevent Unstable

Operation .......................................................................................................................................... 28

Ripple Injection Circuit for Preventing Unstable Operation if No Ripple is Present at FB ................ 29

Voltage Divider Configuration ........................................................................................................... 30

Internal Ripple Injection .................................................................................................................... 31

Package Drawing—28-pin 5mm

6mm QFN (JL) Package ........................................................... 32

List of Tables

Table 2.1

Pin Descriptions ................................................................................................................................ 17

January 25, 2016

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