WL
CS
P9
PCA9410/9410A
3.0 MHz, 500 mA, DC-to-DC boost converter
Rev. 1 — 5 August 2016
Product data sheet
1. General description
The PCA9410 and PCA9410A are highly efficient 3.0 MHz, 500 mA, step-up DC-to-DC
converters. They convert input voltages from 2.5 V to 5.25 V to a fixed output voltage of
5.0 V.
These devices are optimized for battery-powered applications. High efficiency of up to
94 % enables an extended battery life in all portable designs. Step-up operation at a
switching frequency of 3 MHz allows using 1
H
inductor or smaller.
2. Features and benefits
Efficiency up to 94 %
3 % output voltage accuracy at nominal and static conditions
3 % output voltage accuracy over full current, voltage and temperature range
V
IN
V
O
, (Pass-Through Mode Operation)
Load disconnect
Current-mode controller
Soft start function for limiting inrush current with true load disconnect
Overcurrent and over-temperature protection
The PCA9410 totally disconnects input to output when disabled
The PCA9410A connects input to output when disabled
Wafer-Level Chip-Size Package (WLCSP) with 0.4 mm pitch; allows for the use of a
smaller antenna, or for greater signal strength
3. Applications
Smartphones
NFC terminals
4. Ordering information
Table 1.
Ordering information
Topside Package
mark
Name
P10
10A
WLCSP9
WLCSP9
Description
wafer-level chip-size package; 9 bumps; body 1.24
1.24
0.525 mm
wafer-level chip-size package; 9 bumps; body 1.24
1.24
0.525 mm
Version
-
-
Type number
PCA9410UK
PCA9410AUK
NXP Semiconductors
PCA9410/9410A
3.0 MHz, 500 mA, DC-to-DC boost converter
4.1 Ordering options
Table 2.
Ordering options
Orderable part
number
PCA9410UKZ
Package
WLCSP9
Packing method
REEL 7" Q1/T1
*SPECIAL MARK
CHIPS DP
REEL 7" Q1/T1
*SPECIAL MARK
CHIPS DP
Minimum
Temperature
order quantity
3000
T
amb
=
40 C
to +85
C
Type number
PCA9410UK
PCA9410AUK
PCA9410AUKZ
WLCSP9
3000
T
amb
=
40 C
to +85
C
5. Block diagram
BANDGAP
REFERENCE
BIAS
SUPPLY
UNDERVOLTAGE
LOCKOUT
CONTROL
LOGIC
OVERCURRENT
PROTECTION
TEMPERATURE
WATCHDOG
PULSE
GENERATOR
GATE
DRIVER
SOFTSTART
aaa-013240
Fig 1.
Block diagram
PCA9410
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 1 — 5 August 2016
2 of 27
NXP Semiconductors
PCA9410/9410A
3.0 MHz, 500 mA, DC-to-DC boost converter
6. Pinning information
6.1 Pinning
PCA9410/9410A
ball A1
index area
A
1
2
3
PCA9410/9410A
1
A
VOUT
2
VOUT
3
VIN
B
B
SW
SW
EN
C
aaa-013280
C
PGND
PGND
AGND
aaa-013281
Transparent top view
Transparent top view
Fig 2.
Pin configuration WLCSP9 package
Fig 3.
Ball mapping for WLCSP9
6.2 Pin description
Table 3.
Symbol
VOUT
VIN
SW
EN
Pin description
Pin
A1, A2
A3
B1, B2
B3
Description
Output voltage. This pin is the output voltage terminal; connect
directly to C
OUT
.
Input voltage. Connect to Li-Ion battery input power source.
Switching node. Connect to inductor.
Enable. Used to enable/disable the device; HIGH = enabled.
Non-A version: EN low = total disconnect
A version: EN low = forced pass through
PGND
AGND
C1, C2
C3
Power ground. This is the power return for the IC. C
OUT
capacitor
should be returned with the shortest path possible to these pins.
Analog ground. This is the signal ground reference for the IC. All
voltage levels are measured with respect to this pin; connect to
PGND at a single point. The AGND pin should be flooded over by
the ground plane that is connecting the PGND pins to both the
input caps and the output caps.
PCA9410
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 1 — 5 August 2016
3 of 27
NXP Semiconductors
PCA9410/9410A
3.0 MHz, 500 mA, DC-to-DC boost converter
7. Functional description
The step-up converter (Figure
4)
generates a regulated constant output voltage.
L
i(ext)
SW SW
VOUT
VOUT
VIN
C
1
VIN
C
2
VOUT
Enable
EN
AGND PGND PGND
aaa-013259
Fig 4.
Typical DC-to-DC application
7.1 Enable (EN) pin
EN pin enables the boost converter when HIGH. However the effect of the EN when LOW
has two methods of operation, depending on which device is used.
PCA9410 device: the EN pin when LOW causes the part to go into a total disconnect
mode from input to output.
PCA9410A device: EN pin when LOW forces the part into Pass Through mode where the
output voltage is the same as the input voltage. This device emulates a conventional
boost converter (without the voltage drop of the internal diode).
When the EN pin is pulled HIGH it should be held HIGH for at least 500
s
for the device
to properly initialize. This is for getting the forced Pass Through mode set up properly.
Shorter pulses may cause unpredictable behavior.
Table 4.
Mode
LIN
SS
BST
PT
Operating modes
Description
linear start-up
boost soft-start
boost operating mode
pass-through mode
Invoked when
V
IN
> V
OUT
V
IN
< V
OUT
< V
OUT(TARGET)
V
OUT
= V
OUT(TARGET)
V
IN
> V
OUT(TARGET)
or in the advanced
part when EN is pulled LOW
7.1.1 Pass-Through (PT) mode
With both devices, the device automatically transitions from Boost Mode to Pass-Through
Mode if V
IN
goes above the V
OUT
target. In Pass-Through Mode, the device provides a
very low impedance path from V
IN
to V
OUT
. Entry to the Pass-Through Mode is triggered
PCA9410
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 1 — 5 August 2016
4 of 27
NXP Semiconductors
PCA9410/9410A
3.0 MHz, 500 mA, DC-to-DC boost converter
by condition where V
IN
> V
OUT
target. Pass-Through Mode exit is triggered when V
OUT
going down reaches the target V
OUT
voltage. During Automatic Pass-Through Mode, the
PMOS overcurrent protection remains enabled.
In the PCA9410A, user can force the device in Forced Pass-Through Mode through the
EN pin. If the EN pin is pulled HIGH, the device starts operating in Boost Mode. Once the
EN pin is pulled LOW, the device is forced into Pass-Through Mode. To disable the
device, the input supply voltage must be removed. The device cannot start-up in Forced
Pass-Through Mode. During start-up, keep the EN pulled HIGH for 500
s,
before pulling
it LOW and putting the device into Forced Pass-Through Mode. The EN pin has an
internal pull-down resistor (see
Figure 5
for the sequence).
Table 5.
LOW
HIGH
Enable
Description Non-A
Power-down isolated output
Boost mode
Description A
Forced pass-through
Boost mode
EN logic level
V
IN
Enable
Boost
Boost
V
OUT
Forced Pass through
Disconnect
aaa-019181
Fig 5.
Forced pass-through
7.2 Inrush current limiter (soft start)
The PCA9410 and PCA9410A have an integrated pre-charge circuit that prevents large
inrush currents when input voltage is applied. This inrush is accompanied with a current
limit that shuts down the device, and runs a delay timer then attempts a restart.
Once the output voltage reaches the input voltage the soft start function is enabled to limit
the maximum current in boost time and to reduce an input voltage dip. Therefore the
system has a turn-on procedure which starts up step-by-step and limits the inrush current
via a duty cycle control up to the maximum current capability.
7.3 Thermal protection
The PCA9410 and PCA9410A have an integrated thermal protection. The protection
circuit senses the internal temperature of the chip and switches off the integrated PMOS
power switch transistor when temperature reaches 150
C.
After the temperature returns
to a safe value 20
C
below the shutdown temperature, the system restarts in the
pre-charge phase.
PCA9410
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet
Rev. 1 — 5 August 2016
5 of 27
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