User’s Guide (E)
NN31001A-EVB
Contents
1 Introduction
1.1
1.2
1.3
1.4
1.5
……………...……………….……………………........
3
3
3
4
5
6
7
7
8
9
10
11
Under
Development
Overview …………………………………………………….………………...........
Recommended Operating Conditions ………………….…………………….......
Block Diagram
………………..……………………………………….….......
Schematic of evaluation Board
………………………………….….......
Start Process
………………………………………………….….......
………………………………………………….…........
..………….………………………...............................
.................................…………….…………………....
.................................…………….…………………....
……...…….……………………........
2 Evaluation Board
2.1 Appearance
2.2 Pin Function
2.3 Jumpers setup
3 Output Voltage Set Point
4 Bill of Materials
5 Board Layout
IMPORTANT NOTICE
.........………………………………………………………......
.........………………………………………………………......
12
15
……
……………………….…………………………….........
Regulations No.1001V201E_21JAN2014
Page 2 of 15
User’s Guide (E)
NN31001A-EVB
1 Introduction
This user’s guide contains background information for the
Under
Development
NN31001A : 7A Synchronous DC-DC Step Down Regulator(1ch),Power Supply in Package
(PSiP) which integrates a Controller IC that employs a hysteretic control system, two Power
MOSFETs, an Inductor and Capacitors into a single QFN package.
as well as support documentation for the NN31001A Evaluation Board (NN31001A-EVB). Also included are the appearance ,
the pin function , the test set-up , the schematic , the bill of materials and the board layout for the Evaluation Board.
1.1 Overview
NN31001A is a synchronous DC-DC Step Down Regulator (1-ch) Power Supply in Package (PSiP), which integrates a
Controller IC that employs a hysteretic control system, two Power MOSFETs, an Inductor and Capacitors into a single 8.5 x
7.5 x 4.7 mm QFN package. The easiness of mounting PSiP onto Printed Circuit Board (PCB), a very small footprint and a
highly reduced number of external components, offers very compact and simplified solutions for applications requiring point-
of-load design. The number of external components have been reduced to only input / output capacitor, slow start capacitor
and feedback resistors. Furthermore, for applications requiring an output voltage of 1.0V / 3.3V, the external feedback
resistors can be eliminated, resulting into even a smaller footprint.
The PSiP achieves efficiencies of greater than 94% with very good power dissipation capabilities.
Table 1. NN31001A-EVB Input Voltage / Output Current
EVB
NN31001A-EVB
INPUT VOLTAGE RANGE
VIN = 4.5 V to 28 V
VEN = 5 V
OUTPUT CURRENT RANGE
0 A to 7 A
1.2 Recommended Operating Conditions
Table 2. NN31001A-EVB Recommended Operating Conditions
Parameter
Supply Voltage range
Symbol
AV
IN
PV
IN
V
MODE
Input Voltage Range
V
FSEL
V
PRTCNT
V
EN
Output Voltage Range
V
PGOOD
V
LX
Min
4.5
4.5
– 0.3
– 0.3
– 0.3
– 0.3
– 0.3
– 0.3
Typ
12
12
—
—
—
—
—
—
Max
28
28
V
REG
+ 0.3
V
REG
+ 0.3
V
REG
+ 0.3
5.0
V
REG
+ 0.3
V
IN
+ 0.3
Unit
V
V
V
V
V
V
V
V
Notes
—
—
*1
*1
*1
—
*1
*2
Notes : Voltage values, unless otherwise specified, are with respect to GND.
GND is voltage for AGND, PGND. AGND = PGND
V
IN
is voltage for AVIN, PVIN. V
IN
= AV
IN
= PV
IN
.
Do not apply external currents or voltages to any pin not specifically mentioned.
*1 : (V
REG
+ 0.3) V must not exceed 6 V.
*2 : (V
IN
+ 0.3) V must not exceed 30 V.
Regulations No.1001V201E_21JAN2014
Page 3 of 15
Embedded System
京公网安备 11010802033920号
EEWORLD
