SC4212B
Very Low Input /Very Low Dropout
1 Amp Regulator
POWER MANAGEMENT
Features
Description
The SC4212B is a high performance linear voltage regula-
tor designed for applications requiring very low dropout
voltage at load currents up to 1 Ampere. It operates with
VIN as low as 1.6V and up to 6V, making it useful for a wide
range of different applications and rails. The output
voltage is programmable down to 0.5V, set via an external
resistor divider, or to a fixed setting of 0.5V depending
upon how the FB pin is configured.
The SC4212B has an enable pin to further reduce power
dissipation while shut down. Protection features include
over current protection, over temperature protection and
reverse blocking from output to input. The SC4212B is
available in a 3mm x 3mm MLPD-8 package.
Input Voltage Range from 1.6V to 6.0V
150mV Maximum
Dropout @ 1A
Adjustable Output from 0.5V with ± 1% Accuracy
12µA Quiescent Current in Shutdown
Enable Input
250µs Internal Soft-Start
Over Current and Over Temperature Protection
Reverse Blocking from Output to Input
Full Industrial Temperature Range
3mm x 3mm x 1mm MLPD-8 Package
Fully WEEE and RoHS Compliant
Applications
Telecom and Networking Cards
Motherboards and Peripheral Cards
Industrial Applications
Wireless Infrastructure
Medical Equipment
Typical Application Circuit
SC4212B
V IN
EN
V IN
EN
VO
FB
GND
V O = 0 .5 V
VO
V IN
EN
V IN
EN
S C 4 2 1 2B
VO
FB
GND
VO =
0 .5 (R
1
+ R
2
)
R
2
VO
R
1
C
3
C
1
R
2
C
2
C
1
R
2
C
2
* C
3
is a placeholder
Rev. 2.0
© 2015 Semtech Corporation
1
SC4212B
Pin Configuration
TOP VIEW
Ordering Information
Device
SC4212BMLTRC
(1)(2)
SC4212BEVB
8
7
6
5
GND
FB
VO
NC
Package
3mm x 3mm x 1mm MLPD-8
Evaluation Board
NC
EN
VIN
NC
1
2
3
4
Notes:
(1) Available in tape and reel only. A reel contains 3,000 devices.
(2) Available in lead-free package only. Device is WEEE and RoHS
compliant and halogen free.
3mm x 3mm x 1mm MLPD-8
θ
JA
= 36.3°C/W
Marking Information
212B
yyww
xxxx
yyww = Datecode ( Example : 1352 )
xxxx = Semtech Lot No. ( Example : 2932 )
2
SC4212B
Absolute Maximum Ratings
VIN, VO to GND (V) . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 6.5
EN to GND (V). . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to
VIN + 0.3
FB to GND (V) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to
VIN + 0.3
Power Dissipation . . . . . . . . . . . . . . . . . . . . . Internally Limited
ESD Protection Level HBM
(1)
(kV) . . . . . . . . . . . . . . . . . . .
ESD Protection Level CDM (kV) . . . . . . . . . . . . . . . . . . .
(2)
Recommended Operating Conditions
VIN (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 ≤ V
IN
≤ 6.0
Junction Temperature Range (°C) . . . . . . . . . -40 ≤ T
J
≤ +125
Output Current Range . . . . . . . . . . . . . . . . . . . 50
µA
≤ I
O
≤ 1A
4
1
Thermal Information
Thermal Resistance, Junction to Ambient
(3)
(°C/W) . . 36.3
Thermal Resistance, Junction to Case (°C/W) . . . . . . . . 3.77
Storage Temperature (°C) . . . . . . . . . . . . . . . . . . . -65 to +150
Peak IR Reflow Temperature (10s to 30s). . . . . . . . . . +260
Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not recommended.
NOTES:
(1) Tested according to standard ANSI/ESDA/JEDEC JS-001-2012.
(2) Tested according to standard JESD-C101E.
(3) Calculated from package in still air, mounted to 3” x 4.5”, 4 layer FR4 PCB with thermal vias under the exposed pad per JESD51 standards.
Electrical Characteristics
Unless noted otherwise T
J
= 25° C for typical, -40° C < T
J
< 125° C for min and max. V
EN
= V
IN
, V
FB
= V
O
, V
IN
= 1.6V to 6.0V, C
IN
=10µF, C
OUT
=10µF.
Parameter
VIN
V
IN
operating range
(1)
Symbol
Conditions
Min
Typ
Max
Units
1.6
V
IN
= 3.3V, I
O
= 0A
325
6.0
680
2
12
50
V
µA
mA
µA
Quiescent current
I
Q
I
O
= 1A
V
EN
=0V
Feedback
Feedback voltage
(2)
Feedback pin current
VO
Line regulation
(2)
Load regulation
(2)
I
O
= 10mA
I
O
= 10mA to 1A
0.01
0.21
0.2
1.0
%/V
%
V
FB
I
FB
I
O
= 10mA to 1A
V
FB
= V
OUT
0.495
0.500
80
0.505
200
V
nA
3
SC4212B
Electrical Characteristics (continued)
Parameter
Symbol
I
O
=0.5A
Dropout voltage
(3)
Conditions
1.6V ≤ V
IN
< 2.2V
2.2V ≤ V
IN
≤ 6.0V
1.6V ≤ V
IN
< 2.2V
2.2V ≤ V
IN
≤ 6.0V
Min
Typ
Max
86
75
Units
V
DO
I
O
= 1A
mV
175
150
1.2
2.6
A
Current limit
EN
I
CL
Enable pin current
I
EN
V
IH
V
IL
V
EN
= 0V, V
IN
= 1.6V to 6.0V
V
EN
= V
IN
1.2
V
IN
= 1.6V to 6.0V
1.5
80
10
200
µA
nA
Enable pin threshold
Over Temperature Protection
High trip level
Hysteresis
V
0.4
T
HI
T
HYST
150
10
O
C
C
O
Notes:
(1) Minimum V
IN
= V
OUT
+ V
DO
or 1.6V, whichever is greater.
(2) Low duty cycle pulse testing with Kelvin connections required.
(3) V
DO
= V
IN
- V
O
when V
FB
= GND.
4
SC4212B
Pin Descriptions
Pin #
1, 4, 5
2
Pin Name
NC
EN
Pin Function
No connection. Do not connect to any node electrically.
Enable input. Driving this pin high turns on the regulator. Driving this pin low shuts off the regula-
tor. If not driven from a control circuit, tie this pin directly to the VIN pin, or via a resistor up to
400kΩ.
Input supply pin. A large bulk capacitance should be placed close to this pin to ensure that the
input supply does not sag below the minimum V
IN
.
Regulator output pin. Refer to the Applications Information section for output capacitor selection.
Input of the error amplifier. This pin is used to set the output voltage (See typical Application
Circuits on page 1).
Ground pin.
The exposed pad enhances thermal performance and is not electrically connected inside the pack-
age. It is recommended to connect the exposed pad to the ground plane using multiple vias.
3
6
7
8
VIN
VO
FB
GND
THERMAL PAD
Block Diagram
R e ve rse P o la rity
P ro te ctio n C ircu itry
V IN
VO
O ve r-cu rre n t a n d
th e rm a l sh u td o w n
C ircu itry
FB
EN
E n a b le
C ircu itry
V
REF
C ircu itry
GND
5
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