A6932H1.2
2 A ULDO linear regulator for automotive applications
Datasheet - production data
Description
The A6932H1.2 ultra low drop output linear
regulator operates from 2 V to 14 V and is able to
support output current up to 2 A. Designed with
an internal 50 m N-channel MOSFET, it can be
used for on-board DC-DC conversions saving in
real estate, list of components, low noise
generation and power dissipation.
)
s
t(
HSOP-8
c
u
d
Features
AEC-Q100 compliant
e
t
le
200 mRDS(on) max.
200 µA quiescent current at any load
The upper current limit is fixed at 2.5 A to control
the current in short-circuit condition within ± 8%.
The current is sensed in the power MOS in order
to limit the power dissipation.
o
s
b
Excellent load and line regulation
Adjustable from 1.2 V to 5 V
O
)
1% voltage regulation accuracy
Short-circuit protection
HSOP-8 package
Applications
The device is also provided with a thermal
shutdown that limits the internal temperature at
150 °C with a hysteresis of 20 °C. The A6932H1.2
device provides the enable and the Power Good
functions.
s
(
t
c
Thermal shutdown
o
r
P
The A6932H1.2 device is available as adjustable
version from 1.2 V to 5 V with a voltage regulation
accuracy of 1%.
2 V to 14 V input voltage range
u
d
o
r
P
e
Dedicated to automotive applications
Figure 1. Typical operating circuit
t
e
l
o
s
b
O
9LQ
9
9WR
9L Q
(1
9R X W
9RXW
9 W R 9
3*22' 5
/$ +
+
&
*1'
1&
5
)%
&
1&
5
$0
Table 1. Device summary
Part number
Package
Packaging
A6932H1.2
HSOP-8
Tube
A6932H1.2TR
HSOP-8
Tape and reel
November 2013
This is information on a product in full production.
DocID025613 Rev 1
1/14
www.st.com
Contents
A6932H1.2
Contents
1
2
Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
)
s
t(
c
u
d
3
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5
Typical electrical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7
e
t
le
o
r
P
o
s
b
O
)
6.1
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.2
Demonstration board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.3
Component part list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
s
(
t
c
u
d
o
Component selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
r
P
e
7.1
Input capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7.2
Output capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7.3
Loop stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
t
e
l
o
s
b
O
8
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2/14
DocID025613 Rev 1
A6932H1.2
Pin settings
1
Pin settings
1.1
Pin connection
Figure 2. Pin connection (top view)
(1
1&
9LQ
1&
)%
*1'
9RXW
e
t
le
1.2
Pin description
s
(
t
c
o
r
P
3*22'
$0
Table 2. Pin description
Pin no.
1
EN
Enables the device when connected to Vin and disables it when forced to
GND.
VIN
Supply voltage. This pin is connected to the drain of the internal N-MOS.
Connect this pin to a capacitor larger than 10 µF.
3
FB
Connecting this pin to a voltage divider it is possible to program the output
voltage between 1.2 V and 5 V.
4
VOUT
Regulated output voltage. This pin is connected to the source of the internal
N-MOS. Connect this pin to a capacitor of 10 µF.
5
PGOOD
Power Good output. The pin is open drain and detects the output voltage. It
is forced low if the output voltage is lower than 90% of the programmed
voltage.
6
GND
e
t
e
l
so
O
)
c
u
d
Name
2
Ob
o
s
b
)
s
t(
7, 8
Description
du
o
r
P
Ground pin
NC1 - NC2 Internally not connected.
DocID025613 Rev 1
3/14
14
Maximum ratings
A6932H1.2
2
Maximum ratings
2.1
Absolute maximum ratings
Table 3. Absolute maximum ratings
Symbol
VIN
2.2
Parameter
Value
Unit
VIN and PGOOD
14.5
V
EN, OUT and ADJ
-0.3 to (Vin +0.3)
V
)
s
t(
Thermal data
c
u
d
Table 4. Thermal data
Symbol
RthJA
Maximum thermal resistance junction ambient
TMAX
Maximum junction temperature
TSTG
Storage temperature range
Block diagram
O
)
s
(
t
c
du
e
t
e
ol
Figure 3. Internal block diagram
o
r
P
s
b
O
4/14
eP
let
o
s
b
1. Package mounted on board.
3
ro
Parameter
DocID025613 Rev 1
Value
Unit
34(1)
C/W
150
C
-65 to 150
C
A6932H1.2
4
Electrical characteristics
Electrical characteristics
Table 5. Electrical characteristics (Ta = -40 °C to 85 °C, VIN = 5 V unless otherwise specified)
Symbol
Parameter
VIN
Operating supply voltage
VO
Output voltage
Test condition
Min.
Typ.
2
Ta = 25 °C
1.188
1.2
RDS(on)
IOCC
5
VIN = 3.3 V ± 10%; IO = 10 mA
5
ro
Ish
Shutdown current
2.3
t
e
l
o
O
)
f = 120 Hz, IO = 1 A VIN = 5 V,
VIN = 2 Vpp
s
(
t
c
EN input threshold
Pgood threshold
u
d
o
Pgood hysteresis
Pr
Pgood saturation
2.5
0.2
Vo rise
Ipgood = 1 mA
0.5
0.65
mV
200
m
2.7
0.4
29
75
mV
mV
25
60
mV
15
2.85
bs
Ta = 25 °C
Ripple rejection
e
t
e
ol
eP
Ta = 25 °C
Quiescent current
Ven
du
V
)
s
(
ct
5
Drain source ON resistance
Iq
V
VIN = 2.5 V ± 10%; IO = 10 mA
VIN = 3.3 V; 0.1 A < IO < 2 A
Current limiting
14
1.212
VIN = 5 V ± 10%; IO = 10 mA
Load regulation
Unit
1.212
1.175
Line regulation
Max.
A
mA
µA
dB
0.8
V
90
%Vo
10
%Vo
0.2
0.4
V
s
b
O
DocID025613 Rev 1
5/14
14
Typical electrical performance
5
A6932H1.2
Typical electrical performance
Figure 4. Output voltage vs. junction
temperature
Figure 5. Quiescent current vs. junction
temperature
)
s
t(
c
u
d
e
t
le
o
r
P
Figure 6. Shutdown current vs. junction temperature
o
s
b
O
)
s
(
t
c
u
d
o
r
P
e
t
e
l
o
s
b
O
6/14
DocID025613 Rev 1
A6932H1.2
Application information
6
Application information
6.1
Application circuit
Figure 7. Demonstration board application circuit
9LQ
9
9WR
9L Q
/$ +
+
&
*1'
9 W R 9
3*22' 5
(1
A6932H1.2
9R X W
9RXW
1&
5
)%
)
s
t(
&
1&
5
e
t
le
Equation 1
V OUT
o
r
P
c
u
d
$0
1.2
= -------- R 1 + R 2
R2
o
s
b
6.2
O
Demonstration board)layout
s
(
t
c
u
d
o
r
P
e
t
e
ol
Figure 8. Demonstration board layout
s
b
O
DocID025613 Rev 1
7/14
14
Application information
6.3
A6932H1.2
Component part list
Table 6. Component part list
Reference
Part number
Description
Manufacturer
C1
GRM32ER6C226KE20B
22 F, 16 V
Murata
C2
GRM32ER6C226KE20B
22 F, 16 V
Murata
R1
N. M.
R2
0
R3
100 K
)
s
t(
c
u
d
e
t
le
o
s
b
O
)
s
(
t
c
u
d
o
r
P
e
t
e
l
o
s
b
O
8/14
DocID025613 Rev 1
o
r
P
A6932H1.2
Component selection
7
Component selection
7.1
Input capacitor
The input capacitor value depends on a lot of factors such as load transient requirements,
input source (battery or DC/DC converter) and its distance from the input cap. Usually
a 47 µF is enough for any application but a much lower value can be sufficient in many
cases.
7.2
Output capacitor
)
s
t(
The output capacitor choice depends basically on the load transient requirements.
Tantalum, Special Polymer, POSCAP and aluminum capacitors are good and offer very low
ESR values. Multilayer ceramic caps have the lowest ESR and can be required for particular
applications. Nevertheless in several applications they are OK, the loop stability issue has to
be considered (see loop stability section).
c
u
d
o
r
P
In Table 7 is a list of some suggested capacitor manufacturers.
e
t
le
Table 7. Suggested capacitor
Manufacturer
Type
Murata
Ceramic
Panasonic
Ceramic
Rated voltage (V)
1 to 47
4 to 16
1 to 47
4 to 16
1 to 47
4 to 16
Ceramic
1 to 47
4 to 16
Ceramic
1 to 47
4 to 16
SANYO
POSCAP
1 to 47
4 to 16
Panasonic
SP
1 to 47
4 to 16
KEMET
Tantalum
1 to 47
4 to 16
)
s
(
ct
TAIYO YUDEN
TDK
u
d
o
TOKIN
e
t
e
l
o
s
b
O7.3
o
s
b
Cap value (µF)
Pr
Ceramic
-O
Loop stability
The stability of the loop is affected by the zero introduced by the output capacitor. The time
constant of the zero is given by:
Equation 2
T = ESR C OUT
DocID025613 Rev 1
9/14
14
Component selection
A6932H1.2
Equation 3
1
F ZERP = ----------------------------------------------2 ESR C OUT
This zero helps to increase the phase margin of the loop until the time constant is higher
than some hundreds of ns, depending also on the output voltage and current.
So, using very low ESR ceramic capacitors could produce oscillations at the output, in
particular when regulating high output voltages (adjustable version).
To solve this issue is sufficient to add a small capacitor (e.g. 1 nF to 10 nF) in parallel to the
high side resistor of the external divider, as shown in Figure 9.
)
s
t(
Figure 9. Compensation network
Vin=2V to 14V
Vin
2
EN
1
4
A6932H1.2
L6932H1.2
PGOOD
e
t
le
3
GND
)
s
(
ct
7
8
NC1
NC2
so
b
O
-
o
r
P
C3
R1
FB
6
R3
5
C1
c
u
d
Vout=1.2V to 5V
Vout
C2
R2
The thermal resistance junction to ambient of the demonstration board is approximately
34 °C/W.
u
d
o
This mean that, considering an ambient temperature of 60 °C and, a maximum junction
temperature of 150 °C, the maximum power that the device can handle is 2.7 W.
r
P
e
This means that the device is able to deliver a DC output current of 2 A only with a very low
dropout.
t
e
l
o
s
b
O
10/14
DocID025613 Rev 1
A6932H1.2
8
Package information
Package information
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK is an ST trademark.
Figure 10. HSOP-8 package outline
)
s
t(
c
u
d
e
t
le
o
r
P
o
s
b
O
)
s
(
t
c
u
d
o
r
P
e
t
e
l
o
s
b
O
+623
DocID025613 Rev 1
11/14
14
Package information
A6932H1.2
Table 8. HSOP-8 package mechanical data
Dimensions (mm)
Symbol
Note
Min.
Typ.
Max.
A
1.43
1.55
1.68
A1
0.03
0.08
0.13
A2
1.40
1.47
1.55
b
0.35
0.41
0.49
c
0.19
0.20
0.25
D
4.80
4.93
4.98
D1
uc
According to pad size
d
o
r
E
5.84
5.99
6.20
E1
3.81
3.94
3.99
E2
According to pad size
e
1.27
h
0.25
L
0.41
k
0
ccc
)
s
(
ct
0.33
eP
t
e
l
o
bs
0.64
-O
5
)
s
t(
(1)
(2)
(3)
(2)
0.41
0.89
8
Degrees
0.10
1. Dimension “D” does not include mold flash, protrusions or gate burrs.
2. The size of exposed pad is variable depending of leadframe design pad size. End user should verify “D1”
and “E2” dimensions for each device application.
u
d
o
3. Dimension “E1” does not include interlead flash or protrusions. Interlead flash or protrusions shall not
exceed 0.25 mm per side.
r
P
e
t
e
l
o
s
b
O
12/14
DocID025613 Rev 1
A6932H1.2
9
Revision history
Revision history
Table 9. Document revision history
Date
Revision
29-Nov-2013
1
Changes
Initial release.
)
s
t(
c
u
d
e
t
le
o
r
P
o
s
b
O
)
s
(
t
c
u
d
o
r
P
e
t
e
l
o
s
b
O
DocID025613 Rev 1
13/14
14
A6932H1.2
)
s
t(
Please Read Carefully:
c
u
d
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
e
t
le
o
r
P
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
o
s
b
O
)
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
s
(
t
c
u
d
o
ST PRODUCTS ARE NOT DESIGNED OR AUTHORIZED FOR USE IN: (A) SAFETY CRITICAL APPLICATIONS SUCH AS LIFE
SUPPORTING, ACTIVE IMPLANTED DEVICES OR SYSTEMS WITH PRODUCT FUNCTIONAL SAFETY REQUIREMENTS; (B)
AERONAUTIC APPLICATIONS; (C) AUTOMOTIVE APPLICATIONS OR ENVIRONMENTS, AND/OR (D) AEROSPACE APPLICATIONS
OR ENVIRONMENTS. WHERE ST PRODUCTS ARE NOT DESIGNED FOR SUCH USE, THE PURCHASER SHALL USE PRODUCTS AT
PURCHASER’S SOLE RISK, EVEN IF ST HAS BEEN INFORMED IN WRITING OF SUCH USAGE, UNLESS A PRODUCT IS
EXPRESSLY DESIGNATED BY ST AS BEING INTENDED FOR “AUTOMOTIVE, AUTOMOTIVE SAFETY OR MEDICAL” INDUSTRY
DOMAINS ACCORDING TO ST PRODUCT DESIGN SPECIFICATIONS. PRODUCTS FORMALLY ESCC, QML OR JAN QUALIFIED ARE
DEEMED SUITABLE FOR USE IN AEROSPACE BY THE CORRESPONDING GOVERNMENTAL AGENCY.
r
P
e
t
e
l
o
s
b
O
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2013 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
14/14
DocID025613 Rev 1
