Datasheet SY8008AAAC, SY8008AACC, SY8008BAAC, SY8008BACC, SY8008CAAC Datasheet (Silergy) [ru]

SY8008A/SY8008B/SY8008C

Package Code:

High Efficiency 1.5MHz, 0.6A/1A/1.2A

Synchronous Step Down Regulator

Preliminary Spec

General Description

The SY8008A, SY8008B and SY8008C are high­efficiency 1.5MHz synchronous step-down DC-DC
regulator ICs capable of delivering up to 1.2A output
currents. The SY8008 family operate over a wide input
voltage range from 2.5V to 5.5V and integrate main
switch and synchronous switch with very low Rds(on)
to minimize the conduction loss.

Low output voltage ripple and small external inductor
and capacitor sizes are achieved with 1.5MHz
switching frequency. This along with small SOT­23/TSOT-23 footprint provides small PCB area
application.

Applications

• Portable Navigation Device

• Smart phone

• USB Dongle

• Set Top Box

• Media Player

Features

• low Rds(on) for internal switches (top/bottom)
ο SY8008A: 300m Ω /250m Ω, 0.6A
ο SY8008B: 250m Ω /200m Ω, 1A
ο SY8008C: 200m Ω /150m Ω, 1.2A

• 2.5-5.5V input voltage range

• 1.5MHz switching frequency minimizes the

external components

• Internal softstart limits the inrush current

• 100% dropout operation

• RoHS Compliant and Halogen Free

• Compact package: SOT23-5/ TSOT23-5 pin

Ordering Information

SY8008□□□□(□□

□□)□

□

□□□□

□□

Temperature Code
C: -40°C~85°C

AA:SOT23-5
AC:TSOT23-5

Spec Code

Typical Applications

L

R

R

Figure 1 Figure 2. Efficiency vs Load Current

C1(opt.)

1

2

V

C

OUT

OUT

IN

GND

EN

LX

FB

V

IN

C

IN

SY8008Rev. # 0.91 Silergy Corp. Confidential- Prepared for Internal Use Only 1

Pinout (top view)

θ

θ

SY8008A/SY8008B/SY8008C

EN

EN

GND

GND

LX

LX

1

1

2

2

3

3

5

5

FB

FB

4

4

IN

IN

(SOT23-5, TSOT23-5)

Top mark: AAxyz for SY8008AAAC, ABxyz for SY8008BAAC, ACxyz for SY8008CAAC,

BIxyz for SY8008AACC, BGxyz for SY8008BACC

(Device code: AA for SY8008AAAC, etc., x=year code, y=week code, z= lot number code)

Pin Name Pin

Number
EN 1 Enable control. Pull high to turn on. Do not float.
GND 2 Ground pin
LX 3 Inductor pin. Connect this pin to the switching node of inductor
IN 4 Input pin. Decouple this pin to GND pin with at least 1uF ceramic cap
FB 5 Output Feedback Pin. Connect this pin to the center point of the output

Pin Description

resistor divider (as shown in Figure 1) to program the output voltage:
Vout=0.6*(1+R1/R2).Add optional C1(10p-47pF) to speed up transient
response.

Absolute Maximum Ratings

Supply Input Voltage -------------------------------------------------------------------------------- 6.0V
Enable, FB Voltage----------------------------------------------------------------------------------- V
Power Dissipation, PD @ TA = 25°C SOT23-5, TSOT23-5 ----------------------------------- 0.4W
Package Thermal Resistance (Note 2)

SOT23-5, TSOT23-5,

SOT23-5, TSOT23-5,
Junction Temperature Range ------------------------------------------------------------------------ 150°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------ 260°C

Storage Temperature Range ------------------------------------------------------------------------ -65°C to 150°C
ESD Susceptibility (Note 2)

HBM (Human Body Mode) ------------------------------------------------------------------------ 2kV
MM (Machine Mode) ------------------------------------------------------------------------------- 200V

JA

----------------------------------------------------------------- 250°C/W

JC

----------------------------------------------------------------- 130°C/W

(Note 1)

IN

+ 0.6V

Recommended Operating Conditions

Supply Input Voltage ------------------------------------------------------------------------------- 2.5V to 5.5V
Junction Temperature Range ---------------------------------------------------------------------- -40°C to 125°C
Ambient Temperature Range ---------------------------------------------------------------------- -40°C to 85°C

SY8008Rev. # 0.91 Silergy Corp. Confidential- Prepared for Internal Use Only 2

(Note 3)

SY8008A/SY8008B/SY8008C

Electrical Characteristics

(V

IN

= 3.6V, V

Parameter Symbol Test Conditions Min Typ Max Unit
Input Voltage Range VIN 2.5 5.5 V
Shutdown Current I
Feedback Reference
Voltage
FB Input Current IFB VFB=VIN -50 50 nA
PFET RON RDS(ON),P

NFET RON RDS(ON),N

PFET Current Limit I

EN rising threshold VENH 1.5 V
EN falling threshold VENL 0.4 V
Input UVLO threshold V
UVLO hysteresis V
Oscillator Frequency F
Min ON Time 50 ns
Max Duty Cycle 100 %
Thermal Shutdown
Temperature

Note 1: Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device.
These are for stress ratings. Functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may remain possibility to affect device reliability.

Note 2: θJA is measured in the natural convection at TA = 25°C on a low effective single layer thermal
conductivity test board of JEDEC 51-3 thermal measurement standard. Pin 2 of SOT-23-5/TSOT-23-5 packages is

the case position for θJC measurement.

Note 3. The device is not guaranteed to function outside its operating conditions.

OUT

= 2.5V, L = 2.2uH, C

OUT

= 10uF, TA = 25°C, I

SHDN

EN=0 0.1 1 µA

VREF 0.588 0.6 0.612 V

SY8008A 0.3 Ω
SY8008B 0.25 Ω
SY8008C 0.2 Ω
SY8008A 0.25 Ω
SY8008B 0.2 Ω
SY8008C 0.15 Ω

LIM

UVLO
HYS

0.1 V

OSC

IOUT=100mA 1.5 MHz

T

SD

SY8008A 0.8 A
SY8008B 1.2 A
SY8008C 1.5 A

2.5 V

160 °C

MAX

= 1A unless otherwise specified)

SY8008Rev. # 0.91 Silergy Corp. Confidential- Prepared for Internal Use Only 3

SY8008A/SY8008B/SY8008C

SOT23-5 Package outline & PCB layout design

2.40

2.40

0.55

0.55

2.80 - 3.10

2.80 - 3.10

1.50 - 1.70

2.70 - 3.00

2.70 - 3.00

0.80

0.80

1.50 - 1.70

0.95 TYP

0.95 TYP

Recommended Pad Layout

1.0 - 1.3

1.0 - 1.3

0.25 REF

0.1 - 0.15

0.1 - 0.15

0.3 - 0.6

0.3 - 0.6

0.25 REF

Notes: All dimensions are in millimeters.
All dimensions don’t include mold flash & metal burr.

1.90 TYP

1.90 TYP

0.95 TYP

0.95 TYP

0.30 - 0.50

0.30 - 0.50

0.01 - 0.1

0.01 - 0.1

SY8008Rev. # 0.91 Silergy Corp. Confidential- Prepared for Internal Use Only 4

SY8008A/SY8008B/SY8008C

TSOT23-5 Package outline & PCB layout design

2.40

2.40

0.55

0.55

2.80 - 3.10

2.80 - 3.10

1.50 - 1.70

2.70 - 3.00

2.70 - 3.00

1.50 - 1.70

0.80

0.80

0.95 TYP

0.95 TYP

Recommended Pad Layout

0.1 - 0.20

0.3 - 0.6

1.00 (max)

0.25 REF

Notes:
All dimensions don’t include mold flash & metal burr.

All dimensions are in millimeters.

1.90 TYP

0.95 TYP

0.30 - 0.50

0.30 - 0.50

0.01 - 0.1

SY8008Rev. # 0.91 Silergy Corp. Confidential- Prepared for Internal Use Only 5