150mA CMOS LDO
Regulator
(Preliminary)
Description
The
CYT6166
series of fixed output low dropout
linear regulators are designed for portable battery
powered applications, which require low dropout
voltage and low ground current.
Each device
contains a voltage reference unit, an error amplifier,
a PMOS power transistor, and resistors for setting
output voltage, and current limit and temperature
limit protection circuits.
The
CYT6166
has been designed to be used
with low cost capacitors and requires a minimum
output capacitor of 1.0µF. Standard voltage versions
are 1.5, 1.8, 2.5, 2.8, 3.0, and 3.3V.
CYT6166
Features
Typical Low Dropout Voltage of 203mV at
75mA.
Guaranteed 150mA output over the full
operating temperature range.
Excellent Line and Load Regulation.
High Accuracy Output Voltage of 2%.
Typical Low Ground Current at 1mA
Current Limiting and Thermal Protection.
Standard SOT-23-3L, TO-92, and SOT-323-3L
Package.
Applications
Cellphones.
Wireless LAN’s.
Hand-Held Instrumentation.
Portable Video Game Devices.
Digital Cameras.
Marking Information
CYT6166AHN
YYWW
CYT6166BHN
YYWW
CYT6166CHN
YYWW
CYT6166DHN
YYWW
CYT6166EHN
YYWW
CYT6166FHN
YYWW
CYT6166AHG
YYWW
CYT6166BHG
YYWW
CYT6166CHG
YYWW
CYT6166DHG
YYWW
CYT6166EHG
YYWW
CYT6166FHG
YYWW
Ordering/Marking Information
Package
Ordering Information
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
CYT6166AHN
CYT6166BHN
CYT6166CHN
CYT6166DHN
CYT6166EHN
CYT6166FHN
CYT6166AHG
CYT6166BHG
CYT6166CHG
CYT6166DHG
CYT6166EHG
CYT6166FHG
YY: year code
WW: week code.
Preliminary and all contents are subject to change without prior notice.
1
150mA CMOS LDO
Regulator
(Preliminary)
Ordering/Marking Information (Continued)
Package
Ordering Information
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
3.3V
2.8V
2.5V
1.8V
1.5V
3.0V
CYT6166ALN
CYT6166BLN
CYT6166CLN
CYT6166DLN
CYT6166ELN
CYT6166FLN
CYT6166ALG
CYT6166BLG
CYT6166CLG
CYT6166DLG
CYT6166ELG
CYT6166FLG
CYT6166APN
CYT6166BPN
CYT6166CPN
CYT6166DPN
CYT6166EPN
CYT6166FPN
CYT6166APG
CYT6166BPG
CYT6166CPG
CYT6166DPG
CYT6166EPG
CYT6166FPG
166AN_
166BN_
166CN_
166DN_
166EN_
166FN_
166AG_
166BG_
166CG_
166DG_
166EG_
166FG_
166AN_
166BN_
166CN_
166DN_
166EN_
166FN_
166AG_
166BG_
166CG_
166DG_
166EG_
166FG_
Marking Information
CYT6166
Starting with 1, a bar on top of 1 is
for production year 2001, and
underlined 1 is for year 2002.
The
next character is marked on top for
2003, and underlined for 2004. The
naming pattern continues with
consecutive characters for later
years.
The last character is the week
code. (
A-Z:
1-26, a-z: 27-52)
Preliminary and all contents are subject to change without prior notice.
2
150mA CMOS LDO
Regulator
(Preliminary)
Absolute Maximum Ratings
(1)
Supply Input Voltage (V
IN
) ..……...….… 0.7V to +6V
Power Dissipation (P
D
) ……….. Internally Limited
(3)
CYT6166
Operating Ratings
(2)
Supply Input Voltage (V
IN
) ……...... +2.0V to +5.5V
Junction Temperature (T
J
) …….….. 0°C to +125°C
Package Thermal Resistance
160°C/W (TO-92)
230°C/W (SOT-23-3L)
250°C/W (SOT-323-3L)
Junction Temperature (T
J
) ……..... …0°C to +125°C
Lead Temperature (soldering, 5 sec.) …....…. 260°C
Storage Temperature (T
S
) ……….. -40°C to +150°C
Electrical Characteristics
V
IN
= 5V; C
IN
= 2.2µF; C
OUT
= 2.2µF; I
OUT
= 10mA; T
J
= 25°C; unless otherwise noted
Symbol
Parameter
Conditions
CYT6166
– 1.5V
CYT6166
– 1.8V
CYT6166
– 2.5V
CYT6166
– 2.8V
CYT6166
– 3.0V
CYT6166
– 3.3V
V
IN
= V
OUT
+ 1V to 5.5V, I
OUT
= 10mA
V
IN
= 5V; I
OUT
= 10mA to 150mA
Note 4
Min
1.470
1.764
2.450
2.744
2.940
3.234
--
--
Typ
1.5
1.8
2.5
2.8
3.0
3.3
1
1
Max
1.530
1.836
2.550
2.856
3.060
3.366
--
--
Unit
V
V
V
V
V
%
%
V
OUT
Output Voltage
Accuracy
∆V
OUT
∆V
OUT
∆V
OUT
/∆T
Line Regulation
Load Regulation
(5)
Output Voltage
Temperature
Coefficient
--
0.79
--
mV/°C
I
OUT
= 10mA
V
IN
– V
OUT
Dropout Voltage
(6)
I
OUT
= 75mA
I
OUT
= 150mA
T
PROTECTION
PSRR
I
Q
I
LIMIT
Thermal
Protection
Ripple Rejection
Quiescent Current
Current Limit
Thermal Protection Temperature
Protection Hysterisys
f = 120 Hz
I
OUT
= 10mA
--
--
--
--
--
--
--
300
20
203
500
150
20
51
1
--
--
--
--
--
--
--
2
--
°C
dB
mA
mA
mV
Preliminary and all contents are subject to change without prior notice.
3
150mA CMOS LDO
Regulator
(Preliminary)
Note 1:
Exceeding the absolute maximum rating may damage the device.
Note 2:
The device is not guaranteed to function outside its operating rating.
CYT6166
Note 3:
The maximum allowable power dissipation at any T
A
(ambient temperature) is calculated using: P
D(MAX)
=
(T
J(MAX)
– T
A
)/Θ
JA
. Exceeding the maximum allowable power dissipation will result in excessive die temperature,
and the regulator will go into thermal shutdown. See “Thermal Consideration” section for details
Note 4:
Output voltage temperature coefficient is the worst case voltage change divided by the total temperature range.
Note 5:
Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested
for load regulation in the load range from 0.1mA to 150mA.
covered by the thermal regulation specification.
Note 6:
Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its
nominal value measured at 1V differential.
Changes in output voltage due to heating effects are
Typical Application
Preliminary and all contents are subject to change without prior notice.
4
150mA CMOS LDO
Regulator
(Preliminary)
Application Hints
external capacitors to ensure stability.
ensure performance.
The
CYT6166
Thermal Considerations
not exceeded.
protection.
to ground.
The
CYT6166
has built-in thermal
Like any low dropout regulator,
CYT6166
requires It is important that the thermal limit of the package is
external capacitors must be carefully selected to
When the thermal limit is exceeded,
The power dissipation for a given
the IC will enter protection, and V
OUT
will be pulled
application can be calculated as following:
The power dissipation (P
D
) is
P
D
= I
OUT
* [V
IN
– V
OUT
]
The thermal limit of the package is then limited to
P
D(MAX)
= [T
J
– T
A
]/Θ
JA
where T
J
is the junction
temperature, T
A
is the ambient temperature, and
Θ
JA
is around 250°C/W for
CYT6166. CYT6166
is
designed to enter thermal protection at 150°C. For
example, if T
A
is 25°C then the maximum P
D
is
limited to about 0.5W. In other words, if I
OUT(MAX)
=
150mA, then [V
IN
– V
OUT
] cannot exceed 3.33V.
Input Capacitor
An input capacitor of at least 2.2µF is required.
Ceramic or Tantalum can be used. The value can
be increase without upper limit.
Output Capacitor
An output capacitor is required for stability. It must
be placed no more than 1 cm away from the V
OUT
pin, and connected directly between V
OUT
and GND
pins.
The minimum value is 2.2µF but may be
increase without limit.
Preliminary and all contents are subject to change without prior notice.
5
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