MICREL MIC5219-3.0BMM, MIC5219-3.3BM5, MIC5219-3.3BMM, MIC5219-2.7BM5, MIC5219-2.8BM5 Datasheet
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MIC5219 Micrel
S
MIC5219
500mA-Peak Output LDO Regulator
General Description
The MIC5219 is an efficient linear voltage regulator with high
peak output current capability, very low dropout voltage, and
better than 1% output voltage accuracy. Dropout is typically
10mV at light loads and less than 500mV at full load.
The MIC5219 is designed to provide a peak output current for
startup conditions where higher inrush current is demanded.
It features a 500mA peak output rating. Continuous output
current is limited only by package and layout.
The MIC5219 can be enabled or shut down by a CMOS or
TTL compatible signal. When disabled, power consumption
drops nearly to zero. Dropout ground current is minimized to
help prolong battery life. Other key features include reversedbattery protection, current limiting, overtemperature shutdown, and low noise performance with an ultra-low-noise
option.
The MIC5219 is available in adjustable or fixed output voltages in space-saving SOT-23-5 and MM8™ 8-lead power
MSOP packages. For higher power requirements see the
MIC5209 or MIC5237.
Features
• Guaranteed 500mA-peak output over the full operating
temperature range
• Low 500mV maximum dropout voltage at full load
• Extremely tight load and line regulation
• Tiny SOT-23-5 and MM8™ power MSOP-8 package
• Ultra-low-noise output
• Low temperature coefficient
• Current and thermal limiting
• Reversed-battery protection
• CMOS/TTL-compatible enable/shutdown control
• Near-zero shutdown current
Applications
• Laptop, notebook, and palmtop computers
• Cellular telephones and battery-powered equipment
• Consumer and personal electronics
• PC Card VCC and VPP regulation and switching
• SMPS post-regulator/dc-to-dc modules
• High-efficiency linear power supplies
Typical Applications
MIC5219-5.0BMM
ENABLE
HUTDOWN
V
V
6V
IN
5V
OUT
2.2µF
tantalum
1
2
3
4
470pF
5V Ultra-Low-Noise Regulator
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
July 2000 1 MIC5219
8
7
6
5
ENABLE
SHUTDOWN
V
IN
MIC5219-3.3BM5
4V
15
2
3
3.3V
V
OUT
4
2.2µF
tantalum
470pF
3.3V Ultra-Low-Noise Regulator
MIC5219 Micrel
Ordering Information
Part Number Marking Volts Junction Temp. Range Package
MIC5219-3.0BMM — 3.0V –40°C to +125°C MSOP-8
MIC5219-3.3BMM — 3.3V –40°C to +125°C MSOP-8
MIC5219-3.6BMM — 3.6V –40°C to +125°C MSOP-8
MIC5219-5.0BMM — 5.0V –40°C to +125°C MSOP-8
MIC5219BMM — Adj. –40°C to +125°C MSOP-8
MIC5219-2.6BM5 LG26 2.6V –40°C to +125°C SOT-23-5
MIC5219-2.7BM5 LG27 2.7V –40°C to +125°C SOT-23-5
MIC5219-2.8BM5 LG28 2.8V –40°C to +125°C SOT-23-5
MIC5219-2.9BM5 LG29 2.9V –40°C to +125°C SOT-23-5
MIC5219-3.0BM5 LG30 3.0V –40°C to +125°C SOT-23-5
MIC5219-3.3BM5 LG33 3.3V –40°C to +125°C SOT-23-5
MIC5219-3.6BM5 LG36 3.6V –40°C to +125°C SOT-23-5
MIC5219-5.0BM5 LG50 5.0V –40°C to +125°C SOT-23-5
MIC5219BM5 LGAA Adj. –40°C to +125°C SOT-23-5
Other voltages available. Consult Micrel for details.
Pin Configuration
EN
1
IN
2
OUT
3
BYP
4
EN
1
IN
2
OUT
3
ADJ
4
Adjustable Voltage
Pin Description
8
7
6
5
MIC5219-x.xBMM
MM8™ MSOP-8
Fixed Voltages
8
7
6
5
MIC5219BMM
MM8™ MSOP-8
GND
GND
GND
GND
GND
GND
GND
GND
GND
2
IN
13
EN
LGxx
45
OUTBYP
MIC5219-x.xBM5
SOT-23-5
Fixed Voltages
GND
2
IN
13
EN
LGAA
45
OUTADJ
MIC5219BM5
SOT-23-5
Adjustable Voltage
Part
Identification
Pin No. Pin No. Pin Name Pin Function
MSOP-8 SOT-23-5
2 1 IN Supply Input
5–8 2 GND Ground: MSOP-8 pins 5 through 8 are internally connected.
3 5 OUT Regulator Output
1 3 EN Enable (Input): CMOS compatible control input. Logic high = enable; logic
low or open = shutdown.
4 (fixed) 4 (fixed) BYP Reference Bypass: Connect external 470pF capacitor to GND to reduce
output noise. May be left open.
4 (adj.) 4 (adj.) ADJ Adjust (Input): Feedback input. Connect to resistive voltage-divider network.
MIC5219 2 July 2000
MIC5219 Micrel
Absolute Maximum Ratings
Supply Input Voltage (VIN) ............................ –20V to +20V
Power Dissipation (P
Junction Temperature (T
Lead Temperature (Soldering, 5 sec.) ...................... 260°C
) ............................ Internally Limited
D
) .......................–40°C to +125°C
J
Operating Ratings
Supply Input Voltage (VIN) ........................... +2.5V to +12V
Enable Input Voltage (V
Junction Temperature (TJ) .......................–40°C to +125°C
Package Thermal Resistance ......................... see Table 1
) .................................. 0V to V
EN
Electrical Characteristics
VIN = V
Symbol Parameter Conditions Min Typical Max Units
V
OUT
∆V
OUT
∆V
OUT/VOUT
∆V
OUT/VOUT
– V
V
IN
I
GND
PSRR Ripple Rejection f = 120Hz 75 dB
I
LIMIT
∆V
OUT
e
no
ENABLE Input
V
ENL
I
ENL
I
ENH
+ 1.0V; C
OUT
Output Voltage Accuracy variation from nominal V
= 4.7µF, I
OUT
= 100µA; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted.
OUT
OUT
–11%
–22%
/∆T Output Voltage Note 2 40 ppm/°C
Temperature Coefficient
Line Regulation VIN = V
+ 1V to 12V 0.009 0.05 %/V
OUT
0.1
OUT
Load Regulation I
Dropout Voltage, Note 4 I
= 100µA to 500mA Note 3 0.05 0.5 %
OUT
= 100µA1060mV
OUT
= 50mA 115 175 mV
I
OUT
= 150mA 175 300 mV
I
OUT
I
= 500mA 350 500 mV
OUT
0.7
80
250
400
600
Ground Pin Current, Notes 5, 6 VEN ≥ 3.0V, I
= 100µA80130µA
OUT
170
V
≥ 3.0V, I
EN
= 50mA 350 650 µA
OUT
900
V
≥ 3.0V, I
EN
= 150mA 1.8 2.5 mA
OUT
3.0
V
≥ 3.0V, I
EN
= 500mA 12 20 mA
OUT
25
Ground Pin Quiescent Current, VEN ≤ 0.4V 0.05 3 µA
Note 6
Current Limit V
VEN ≤ 0.18V 0.10 8 µA
= 0V 700 1000 mA
OUT
/∆PDThermal Regulation Note 7 0.05 %/W
Output Noise I
= 50mA, C
OUT
I
= 50mA, C
OUT
= 2.2µF, C
OUT
= 2.2µF, C
OUT
= 0 500
BYP
= 470pF 300
BYP
nV/ Hz
nV/ Hz
Enable Input Logic-Low Voltage VEN = logic low (regulator shutdown) 0.4 V
0.18
VEN = logic high (regulator enabled) 2.0 V
Enable Input Current V
≤ 0.4V 0.01 –1 µA
ENL
V
≤ 0.18V 0.01 –2 µA
ENL
V
≥ 2.0V 2 5 20 µA
ENH
25
IN
July 2000 3 MIC5219
MIC5219 Micrel
Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when
Note 2: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 3: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load
Note 4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V
Note 5: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of
Note 6: VEN is the voltage externally applied to devices with the EN (enable) input pin.
Note 7: Thermal regulation is defined as the change in output voltage at a time “t” after a change in power dissipation is applied, excluding load or line
Note 8: C
operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction
temperature, T
dissipation at any ambient temperature is calculated using: P
tion will result in excessive die temperature, and the regulator will go into thermal shutdown. See Table 1 and the “Thermal Considerations”
, the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power
J(max)
D(max)
= (T
– TA) ÷ θJA. Exceeding the maximum allowable power dissipa-
J(max)
section for details.
range from 100µA to 500mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.
differential.
the load current plus the ground pin current.
regulation effects. Specifications are for a 500mA load pulse at VIN = 12V for t = 10ms.
is an optional, external bypass capacitor connected to devices with a BYP (bypass) or ADJ (adjust) pin.
BYP
MIC5219 4 July 2000
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