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SYR837 Datasheet Preview

SYR837 Datasheet

Synchronous Step Down Regulator

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SYR837 pdf
Application Note: AN_SYR837/SYR838
High Efficiency 5.5V, 6A, 2.4MHz
I2C Programmable, Synchronous Step Down Regulator
General Description
SYR837/SYR838 is a high efficiency 2.4MHz synchronous
step down DC/DC regulator IC capable of delivering up to
6A output currents. It can operate over a wide input voltage
range from 2.6V to 5.5V and integrate main switch and
synchronous switch with very low RDS (ON) to minimize the
conduction loss. The output voltage can be programmed
from 0.7125V to 1.5V through I2C interface.
SYR837/SYR838 is in a space saving, low profile
CSP1.56*1.96-20 package.
Ordering Information
SYR837/8(□□)
Temperature Code
Package Code
Optional Spec Code
Ordering Number
SYR837PKC
SYR838PKC
Package Type
CSP1.56*1.96-20
CSP1.56*1.96-20
Note
0x40H
0x41H
Features
Input voltage range: 2.6V to 5.5V
2.4 MHz switching frequency minimizes the external
components
Typical 65uA quiescent current
Low RDS(ON) for internal switches (PFET/NFET):
28mΩ/17mΩ
Programmable Output Voltage: 0.7125V to 1.5V in
12.5mV steps
6A continuous output current capability.
Capable for 0.25uH inductor and 22uF Ceramic
Capacitor.
Hic-cup mode protection for hard short condition
RoHS Compliant and Halogen Free
Compact package: CSP1.56*1.96-20
Applications
Smart-phone
Web-tablets
Typical Applications
VIN:2.6~5.5V
CIN
22uF/6.3V
K1 K2
R1
1M
R2
1M
VIN LX
VOUT
VSEL
EN SCL
SDA
GND AGND
L1:0.25uH
VOUT
COUT
22uF/6.3V
Figure 1. Schematic Diagram
Figure2. Efficiency
AN_SYR837/SYR838 Rev.0.9 Silergy Corp. Confidential-Prepared for Customer Use Only
1



Silergy
Silergy

SYR837 Datasheet Preview

SYR837 Datasheet

Synchronous Step Down Regulator

No Preview Available !

SYR837 pdf
Pinout (top view)
AN_SYR837/SYR838
Part Number
SYR837PKC
SYR838PKC
Package type
CSP1.56*1.96-20
CSP1.56*1.96-20
Top Mark
Jn xyz
Jq xyz
Note① : x=year code, y=week code, z= lot number code.
Pin
D1,D2,E1,E2
D3,D4,E3,E4
B2,B3,C1,C2,C3,C4
A1
A2
B1
B4
A3
A4
Pin Name
VIN
SW
GND
VSEL
EN
SDA
AGND
SCL
VOUT
Pin Description
Power input pin. These pins must be decoupled to ground with at least
22uF ceramic capacitor. The input capacitor should be placed as close as
possible between VIN and GND pins.
Switching node pin. Connect these pins to the switching node of inductor.
Power ground pins.
Voltage select pin. When this pin is low, VOUT is set by the VSEL0 register.
When this pin is high, VOUT is set by the VSEL1 register.
Enable control pin. Active high. Do not leave it floating.
I2C interface Bi-directional Data line.
Analog ground pin.
I2C interface clock line.
Sense pin for output. Connect to the output capacitor side.
AN_SYR837/SYR838Rev. 0.9 Silergy Corp. Confidential- Prepared for Customer Use Only
2


Part Number SYR837
Description Synchronous Step Down Regulator
Maker Silergy
Total Page 15 Pages
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