APE8837JGN2-HF - Advanced Power Electronics Corp. USA

Advanced Power

Electronics Corp. APE8837

DUAL CHANNEL LDO REGULATORS WITH ENABLE

FEATURES DESCRIPTION

Input Voltage Range : 2.5V to 6V

Varied Fixed Output Voltage Combinations

150mV Dropout at 100mA Output

Current (Vout≧2.8V)

Output Current: 200mA/channel (typ.)

Low Quiescent Current

Standby Current: 2uA (typ.)

Current Limit and Short Current Protections

Thermal Shutdown Protection

Fast Transient Response

Low ESR Capacitor Compatible (X7R, X5R)

Available in the 6-Pin Pb-Free SOT-26

and DFN 2x2 Packages

TYPICAL APPLICATION

ORDERING INFORMATION

Table1.

Data and specifications subject to change without notice

201003171

The APE8837 is a high accurately, low noise, high

ripple rejection ratio, low dropout, dual CMOS LDO voltage

regulators with enable function. The EN function allows the

output of each regulator to be turned off independently,

resulting in greatly reduced power consumption.

The APE8837 has the soft start function to suppress

the inrush current. The current limit is over 250mA per

channel and also operates as a short protection for the

output current limiter. The output voltage for each regulator

is set independently by metal trimming.

The APE8837 is fully compatible with low ESR ceramic

capacitors, reducing cost and improving output stability. This

high level 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 frequency. It is available in the SOT-26 and DFN 2x2

packages.

CIN

1uF

VOUT2 VOUT1

GND

OUT2

VOUT2

OUT1

APE8837A

1uF 1uF

OUT1

EN1

EN2 VIN

VIN

APE8837 X X - HF

Y : SOT-26

Output Type Package

(Refer Table ) GN2 : DFN 2x2

Halogen Free

A : 1.5V + 2.8V H : 2.8+ 3.0V R : 3.3V +1.8V

B : 1.8V + 2.8V J : 2.8+3. 3V T : 1. 5V+3. 3V

C : 1.8V +2.6V K : 3. 0+3.0V V : 1.5V + 3.0V

D : 1.8V+3.3V L : 3.0V+3.3V W : 1.2V+2.8V

E : 2.5V + 2.8V M : 3. 3+3.3V X : 1. 2V +1.2V

F : 2.8V+1.2V P : 1.8V+3.0V Y : 2.8V+1.5V

G : 2.8V+1.8V Q : 1.5V+2.5V

Output Type Code : (V

OUT1

OUT2

)

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Electronics Corp. APE8837

ABSOLUTE MAXIMUM RATINGS (at TA=25°C)

Input Voltage (VIN) ----------------------------------------- GND - 0.3 to + 6V

Output Current (IO1+IO2) ----------------------------------- 500mA

Output Voltage (VOUT1/VOUT2) ----------------------

GND - 0.3 to VIN + 0.3

Enable Voltage (VEN1/VEN2) --------------------------

GND - 0.3 to VIN + 0.3

Power Dissipation (PD) ------------------------------------

250mW

Storage Temperature Range (TST) --------------------- -40 to 150°C

Operating Temperature Range (TOP) ------------------ -40 to 85°C

Junction Temperature Range (TJ) ---------------------

-40 to 125°C

Thermal Resistance from Junction to case (Rthjc) 180oC/W

250oC/W

Note. Rthja is measured with the PCB copper area of approximately 1 in2(Multi-layer). That need connect to GND pin.

PACKAGE INFORMATION

ELECTRICAL SPECIFICATIONS (TA=25℃, unless otherwise noted.)

Parameter SYM TEST CONDITION MIN TYP MAX UNITS

Input Voltage VIN Note1. 2.5 - 5.5 V

IOUT =1mA, VIN=5V,VOUT >2.0V -2 - 2 %

IOUT =1mA, VIN=5V,VOUT ≦2.0V -0.04 - 0.04 V

Quiescent Current ICC IOUT1,2=0mA, VIN=5V - 60 100 uA

IOUT=0.2A, VO=VO-2%, VOUT=1.5V -1000 1200

IOUT=0.2A, VO=VO-2%, VOUT=1.8V -700 900

IOUT=0.2A, VO=VO-2%, VOUT>2.5V -300 400

Current Limit (Note2) ILIMIT VIN=VOUT (T) + 1.0V, VEN=VIN 250 - - mA

Short Circuit Current ISC VOUT<1.0V, each channel - 150 - mA

Line Regulation ∆VLINE IOUT =1mA, VIN=VOUT+1V to 6.0V - 0.2 0.3 %/V

Load Regulation (Note 3) ∆VLOAD IOUT =1~100mA, VIN=VOUT+1V - 0.01 0.03 %/mA

Ripple Rejection PSRR F=120Hz, IOUT= 30mA - 60 - dB

Output Voltage Temperature Coefficient IOUT=30mA (Note 4) - +100 - PPM/ºC

VENH 2--

VENL - - 0.8

Enable Pull-high Current IEN VEN1,2 = 0V - 1 2 uA

Shutdown Current ISD IOUT1,2 =0mA, VIN=5V, VEN1,2=0V - 2 4 uA

Thermal Shutdown Temperature TST - 150 -ºC

Thermal Shutdown Hysterisis TSH - 40 -ºC

Thermal Resistance from Junction to ambient (Rthja)

Enable Input Threshold

Output Voltage Accuracy ∆VOUT

Dropout Voltage VDROP

DFN 2x2 (6L)

VOUT2

EN1 EN2

1 2 3

456

VIN

GND

VOUT1

(TOP VIEW)

GND

APE8837

(Top View)

SOT-26

VIN GND

EN1 VOUT1

EN2 VOUT2

APE8837

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Electronics Corp. APE8837

Note 1. VIN (min) =VOUT+VDROP

Note 2. Current limit is measured at constant junction temperature by using pulsed testing with a low ON time.

Note 3. Regulation is measured at constant junction temperature by using pulsed testing with a low ON time.

Note 4. Guaranteed by design.

PIN DESCRIPTIONS

PIN SYMBOL PIN DESCRIPTION

VIN Input Voltage

GND Common Ground Pin

EN1 VOUT1 Enable Control Pin

EN2 VOUT2 Enable Control Pin

VOUT1 Output1 Voltage

VOUT2 Output2 Voltage

BLOCK DIAGRAM

FUNCTION DESCRIPTION

Current

Limit1

VIN

VOUT1

GND

Error

Amp

Bandgap

Thermal

Shutdown

Enable1

EN1

Current

Limit2

Error

Amp Enable2

EN2

VOUT2

The APE8837 is a highly accurate, dual, low noise, CMOS LDO voltage

regulators with enable function. The output voltage for each regulator is set

independently by fuse trimming. As illustrated in function block diagram, it consists of a

reference, error amplifier, a P-channel pass transistor, an ON/OFF control logic and an

internal feedback voltage divider. The band gap reference is connected to the error

amplifier, which compares the reference with the feedback voltage and amplifies the

voltage difference. If the feedback voltage is lower than the reference voltage, the

pass- transistor gate is pulled lower, which allows more current to pass to the VOUT pin

and increases the output voltage. If the feedback voltage is too high, the pass

transistor gate is pulled up to decrease the output voltage. The output voltage is feed

back through an internal resistive divider connected to VOUT pin. Additional blocks

include an output current limiter, thermal sensor, and shutdown logic.

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Electronics Corp. APE8837

Enable Function

Dropout Voltage

Current Limit

Thermal Shutdown Protection

APPLICATION INFORMATION

Input Capacitor

Thermal Shutdown protection limits total power dissipation of APE8837. When

the junction temperature exceeds TJ = +150°C, a thermal sensor turns off the pass

transistor, allowing the IC to cool down. The thermal sensor turns the pass transistor

on again after the junction temperature cools down by 40°C, resulting in a pulsed

output during continuous thermal shutdown conditions.

Thermal shutdown protection is designed to protect the APE8837 in the event of fault

conditions. For continuous operation, the absolute maximum operating junction

temperature rating of TJ = +125°C should not be exceeded.

EN1 and EN2 pin start and stop the corresponding outputs independently. When

the EN pin is switched to the power off level, the operation of all internal circuit stops,

the build-in P-channel MOSFET output transistor between pins VIN and VOUT is

switched off, allowing current consumption to be drastically reduced.

A regulator’s minimum input-output voltage differential, or dropout voltage,

determines the lowest usable supply voltage. The APE8837 use a P- channel

MOSFET pass transistor, its dropout voltage is function of drain-to-source on-

resistance RDS (ON) multiplied by the load current.

VDROPOUT = VIN-VOUT = RDS(ON) x IOUT

Each channel of APE8837 includes a fold back current limiter. It monitors and

controls the pass transistor’s gate voltage, estimates the output current, and limits the

output current within 250mA.

Like any low-dropout regulator, the APE8837 requires input and output

decoupling capacitors. The device is specifically designed for portable applications

requiring minimum board space and smallest components. These capacitors must be

correctly selected for good performance (see Capacitor Characteristics Section).

Please note that linear regulators with a low dropout voltage have high internal loop

gains which require care in guarding against oscillation caused by insufficient

decoupling capacitance.

An input capacitance of 1µF is required between input pin and ground directly

(the amount of the capacitance may be increased without limit). The input capacitor

must be located less than 1cm from the device to assure input stability. A lower ESR

capacitor allows the use of less capacitance, while higher ESR type (like aluminum

electrolytic) requires more capacitance. Capacitor types (aluminum, ceramic and

tantalum) can be mixed in parallel, but the total equivalent input capacitance/ ESR

must be defined as above to stable operation. There are no requirements for the ESR

on the input capacitor, but tolerance and temperature coefficient must be considered

when selecting the capacitor to ensure the capacitance will be 1µF over the entire

operating temperature range.

Advanced Power

Electronics Corp. APE8837

Output Capacitor

Thermal Considerations

The APE8837 series can deliver a current of up to 200mA/channel over the full

operating junction temperature range. However, the maximum output current must be

debated at higher ambient temperature to ensure the junction temperature does not

exceed 125°C. With all possible conditions, the junction temperature must be within

the range specified under operating conditions. Power dissipation can be calculated

based on the output current and the voltage drop across regulator.

PD = (VIN - VOUT) IOUT + VIN x IGND

The final operating junction temperature for any set of conditions can be

estimated by the following thermal equation:

PD (MAX) = (TJ (MAX) - TA) / θJA

Where TJ (MAX) is the maximum junction temperature of the die (125°C) and TA is

the maximum ambient temperature. The junction to ambient thermal resistance (θJA)

SOT-26 package at recommended minimum footprint is 250°C/W.

The APE8837 is designed specifically to work with very small ceramic output

capacitors. A ceramic capacitor (temperature characteristics X7R, X5R) in 1μF is

suitable for the APE8837 application. The recommended minimum capacitance for the

device is 1μF, X5R or X7R dielectric ceramic, between VOUT and GND for stability,

but it may be increased without limit. Higher capacitance values help to improve

transient. The output capacitor's ESR is critical because it forms a zero to provide

phase lead which is required for loop stability.

Package Outline : SOT-26

Millimeters

SYMBOLS MIN NOM MAX

A 2.70 2.90 3.10

B 2.60 2.80 3.00

C 1.40 1.60 1.80

D 0.30 0.43 0.55

E 0.00 0.05 0.10

1.All Dimension Are In Millimeters.

2.Dimension Does Not Include Mold Protrusions.

Part Marking Information & Packing : SOT-26

0.37REF

0.95REF

1.90REF

ADVANCED POWER ELECTRONICS CORP.

0.12REF

H 1.20REF

RP&YY

Part Number : RP

Date Code

YY:2004,2008,2012…

YY:2003,2007,2011…

YY:2002,2006,2010…

YY:2001,2005,2009…

Vout Code

(see the table1.)

Package Outline : DFN 2x2-6L

Millimeters

MIN NOM MAX

A0.80 0.85 1.00

A1 0.00 －0.05

b 0.20 0.25 0.30

C0.195 0.203 0.211

D 1.95 2.00 2.05

D2 0.55 0.60 0.65

E 1.95 2.00 2.05

E2 1.15 1.20 1.25

L0.3 0.35 0.4

1.All Dimension Are In Millimeters.

2.Dimension Does Not Include Mold Protrusions.

Part Marking Information & Packing : DFN 2x2-6L

Draw No. I1-N3S6-G-v00

0.65 (ref)

SYMBOLS

ADVANCED POWER ELECTRONICS CORP.

Date Code (YWS)

Y:Year

W：Week

S：Sequence

RP&

YWS

Vout Code (see the table1.)

Part Number : RP