HE6211 Series
High Speed Low Noise LDO
Ver10 1 Jul 262013
Features
 Low power consumption25uA (Typ)
 Low voltage drop02V@100mA(Typ)
 Low output noise(27uVRMS)
 Standby Mode 01uA
 Low temperature coefficient
 Output Voltage Range 09V~5V


 Good line Regulation005V
 High Ripple Rejection 70dB@1kHz(Typ)
 High input voltage (up to 7V)
 Output voltage accuracy tolerance ±2
 Buildin EnableOutput Current Limit circuit
 SOT23 SOT235 and SOT89 package

Applications
 Batterypowered equipment
 Communication equipment
 Mobile phones

 Portable games
 Cameras Video cameras
 Reference voltage sources

General Description
The HE6211 series are highly accurate low noise
CMOS LDO Voltage Regulators Offering low
output noise high ripple rejection ratio low
dropout and very fast turnon times the HE6211
series is ideal for today’s cutting edge mobile
phone Internally the HE6211 includes a reference
voltage source error amplifiers driver transistors
current limiters and phase compensators The
HE6219’s current limiters＇ feedback circuit also
operates as a short protect for the output current
limiter and the output pin The output voltage is
set by current trimming Voltages are selectable in
100mV steps within a range of 09V to 50V The
HE6211 series is also fully compatible with low
ESR ceramic capacitors reducing cost and
improving output stability This high level of output
stability is maintained even during frequent load
fluctuations due to the excellent transient
response performance and high PSRR achieved
across a broad range of frequencies The CE
function allows the output of regulator to be turned
off resulting in greatly reduced power
consumption

Order Information

HE6211 Series
High Speed Low Noise LDO
Ver10 2 Jul 262013
Package and Pin assignment


Block Diagram

HE6211 Series
High Speed Low Noise LDO
Ver10 3 Jul 262013

Marking Rule

① Represents product series
Mark Product Series
L HE6211xxxxxx
② Represents type of regulator
Mark
Product series Vout 100mV Increments Vout 50mV Increments
Vout01~30V Vout31~60V Vout015~305V Vout315~605
V A E L HE6211Axxxxx
③ Represents output Voltage
Mark Output Voltage(V) Mark Output Voltage(V)
0 31 315 F 16 46 165 465
1 32 325 H 17 47 175 475
2 33 335 K 18 48 185 485
3 34 345 L 19 49 195 495
4 35 355 M 20 50 205
5 36 365 N 21 215
6 37 375 P 22 225
7 38 385 R 23 235
8 09 39 095 395 S 24 245
9 10 40 105 405 T 25 255
A 11 41 115 415 U 26 265
B 12 42 125 425 V 27 275
C 13 43 135 435 X 28 285
D 14 44 145 445 Y 29 295
E 15 45 155 455 Z 30 305
④ Respresents production lot number
0 to 9 A to Z reverse character of 0 to 9 A to Z repeated ( G I O Q W excepted)



HE6211 Series
High Speed Low Noise LDO
Ver10 4 Jul 262013
Absolute Maximum Ratings
Supply Voltage 03V to 8V
Operating Temperature 40℃ to 85℃
Storage Temperature 50℃ to 125℃
Note These are stress ratings only Stresses exceeding the range specified under Absolute Maximum Ratings
may cause substantial damage to the device Functional operation of this device at other conditions beyond
those listed in the specification is not implied and prolonged exposure to extreme conditions may affect
device reliability
Thermal Information
Symbol Parameter Package Max Unit
θ JA
Thermal Resistance (Junction to
Ambient) (Assume no ambient
airflow no heat sink)
SOT233 500 ℃W
SOT235 500 ℃W
SOT895 200 ℃W
PD Power Dissipation
SOT233 020 W
SOT235 020 W
SOT895 050 W
Note PD is measured at Ta 25℃



Electrical Characteristics

HE6211 for any output voltage （Ta25℃）
Parameter Symbol Conditions Min Typ Max Unit
Output Voltage Vout
VinVout+1V
10mA≤Iout≤30mA
Vout×098 Vout×102 V
Output Current*1 Iout VinVout1V 250 mA
Low dropout*2 Vdrop Refer to the next table
Line Regulation △Vout1(Vin·Vout)
16V≤Vin≤8V
Iout40mA
005 02 V
Load Regulation △Vout ΔIout
Vin Vout+1V
10mA≤Iout≤80mA
12 30 mV
Output voltage
Temperature
Coefficiency
△Vout(Ta·Vout)
Iout30mA
0℃≤Ta≤70℃
±100 Ppm℃
Supply Current Iss1 25 40 uA
Input Voltage Vin 7 V
PSRR PSRR
F1KHz
VinVout+1V
70 dB
Output Noise EN BW10Hz～100KHz 27 uVrms

HE6211 Series
High Speed Low Noise LDO
Ver10 5 Jul 262013
Electrical Characteristics by Output Voltage：
Output Voltage Vout(V)
Dropout Voltage Vdif（V）
Conditions Typ Max
Vout≤15V
Iout100 mA
040 075
Vout16V 038 068
Vout17V 036 063
18 ≤ Vout ≤ 2 035 060
21 ≤ Vout ≤ 27 030 052
28 ≤ Vout ≤ 50 020 030











Operational Explanation

The voltage divided by resistors R1 & R2 is compared with the internal reference voltage by the error amplifier
The Pchannel MOSFET which is connected to the VOUT pin is then driven by the subsequent output signal The
output voltage at the VOUT pin is controlled and stabilized by a system of negative feedback The current limit
circuit and short protect circuit operate in relation to the level of output current Further the IC＇s internal circuitry
can be shutdown via the CE pin＇s signal

With the HE6211 series a stable output voltage is achievable even if used with low ESR capacitors as a phase
compensation circuit is builtin In order to ensure the effectiveness of the phase compensation we suggest that
an output capacitor (CL) is connected as close as possible to the output pin (VOUT) and the VSS pin Please use
an output capacitor with a capacitance value of at least 10uF Also please connect an input capacitor (CIN) of
10uF between the VIN pin and the VSS pin in order to ensure a stable power input Stable phase compensation
may not be ensured if the capacitor runs out capacitance when depending on bias and temperature In case the
capacitor depends on the bias and temperature please make sure the capacitor can ensure the actual
capacitance

The HE6211 series includes a combination of a fixed current limiter circuit & a feedback circuit which aid the
operations of the current limiter and circuit protection When the load current reaches the current limit level the
fixed current limiter circuit operates and output voltage drops As a result of this drop in output voltage the
feedback circuit operates output voltage drops further and output current decreases When the output pin is
shorted a current of about 50mA flows

The IC＇s internal circuitry can be shutdown via the signal from the CE pin with the HE6211 series In shutdown
mode output at the VOUT pin will be pulled down to the VSS level via R1 & R2 The operational logic of the IC＇s CE
pin is selectable (please refer to the selection guide) Note that as the standard HE6211 type＇s regulator 1 and 2
are both ＇ High ActiveNo PullDown＇ operations will become unstable with the CE pin open Although the CE pin HE6211 Series
High Speed Low Noise LDO
Ver10 6 Jul 262013
is equal to an inverter input with CMOS hysteresis with either the pullup or pulldown options the CE pin input
current will increase when the IC is in operation We suggest that you use this IC with either a VIN voltage or a VSS
voltage input at the CE pin If this IC is used with the correct specifications for the CE pin the operational logic is
fixed and the IC will operate normally However supply current may increase as a result of through current in the
IC＇s internal circuitry


Notes on Use
1 Please use this IC within the stated absolute maximum ratings The IC is liable to malfunction should the
ratings be exceeded
2 Where wiring impedance is high operations may become unstable due to noise andor phase lag depending
on output current Please keep the resistance low between VIN and VSS wiring in particular
3 Please wire the input capacitor (CIN) and the output capacitor (CL) as close to the IC as possible



Typical Application Circuit




HE6211 Series
High Speed Low Noise LDO
Ver10 7 Jul 262013

Packaging Information

SOT235 Outline Dimensions



SOT895 Outline Dimensions HE6211 Series
High Speed Low Noise LDO
Ver10 8 Jul 262013












SOT23 Outline Dimensions
HE6211 Series
High Speed Low Noise LDO
Ver10 9 Jul 262013



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