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uP1590 Datasheet Preview

uP1590 Datasheet

Dual Synchronous Buck Controller

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uP1590
Dual Synchronous Buck Controller with
5V/3.3V 100mA LDOs for Notebook System Power
General Description
The uP1590 is a dual synchronous buck controller with
5V/3.3V 100mA LDOs for notebook system power supply
solution.
The uP1590 supports high efficiency, fast transient
response and provides a combined POK signal. The
ultrasonic mode maintains the switching frequency above
audio frequency, which eliminates noise in audio
applications. The proprietary RCOTTM technology provides
fast transient response and high noise immunity.
The uP1590 has internal soft-start to control the inrush
current. Other features include over current protection,
over/under voltage protection, power-up sequencing, POK
output, and thermal shutdown. The uP1590 is available
in the space saving package WQFN3x3-20L, specified
from -40OC to 85OC.
Applications
† Notebook and Subnotebook System Power
Supplies
† 3-4 Cell Li-Ion Battery-Power Devices
† Dual Output Supplies for DSP, Memory, Logic
and Microprocessor
Features
† Wide Input Voltage Range: 5.5V to 26V
† Two Synchronous Buck Controllers
„ Dual Fixed 5V/3.3V Outputs or Adjustable from
2V to 5.5V
„ Selectable DEM and USM in Light Load
(uP1590P)
„ Internal Soft-Start and Soft-Discharge
„ RCOTTM (Robust Constant On-Time) Control
Architecture
„ 4500ppm/OC RDS(ON) Current Sensing
† 100mA 5V/3.3V LDO with Switches
† Secondary FB Input Maintains Charge Pump
Voltage (uP1590Q Only)
† Power OK Indicator
† OVP/UVP/OCP/OTP
† WQFN3x3-20L
† RoHS Compliant and Halogen Free
Ordering Information
Order Number
Package Type
Top Marking
Operation Mode
Remark
uP1590PQKF
uP1590P
Selectable by ENM Pin
Pin 13: ENM
uP1590QQKF
WQFN3x3-20L
uP1590Q
DEM
Pin 13: SECFB
uP1590RQKF
uP1590R
USM
Pin 13: TP
Note:
(1) Please check the sample/production availability with uPI representatives.
(2) uPI products are compatible with the current IPC/JEDEC J-STD-020 requirements. They are halogen-free, RoHS
compliant and 100% matte tin (Sn) plating that are suitable for use in SnPb or Pb-free soldering processes.
uP1590-DS-P0200, Oct. 2013
www.upi-semi.com
1




uPI Semiconductor

uP1590 Datasheet Preview

uP1590 Datasheet

Dual Synchronous Buck Controller

No Preview Available !

15 14 13 12 11
LGATE1 16
PHASE1 17
UGATE1 18
BOOT1 19
BYP1 20
21 GND
10 LGATE2
9 PHASE2
8 UGATE2
7 BOOT2
6 POK
12345
uP1590
Pin Configuration
uP1590P
15 14 13 12 11
LGATE1 16
10 LGATE2
PHASE1 17
UGATE1 18
BOOT1 19
BYP1 20
21 GND
9 PHASE2
8 UGATE2
7 BOOT2
6 POK
12345
15 14 13 12 11
LGATE1 16
10 LGATE2
PHASE1 17
UGATE1 18
BOOT1 19
BYP1 20
21 GND
9 PHASE2
8 UGATE2
7 BOOT2
6 POK
12345
uP1590Q
uP1590R
Typical Application Circuit
VO2 = 3.3V
2
VIN VREG5
POK
POK
BOOT2
UGATE2
PHASE2
LGATE2
21
GND
BYP1
BOOT1
UGATE1
PHASE1
LGATE1
VIN
VO1 = 5V
VIN = 5.5~26V
EN0
ENM
uP1590P
VREG5
5V/100mA
3.3V/100mA
uP1590-DS-P0200, Oct. 2013
www.upi-semi.com


Part Number uP1590
Description Dual Synchronous Buck Controller
Maker uPI Semiconductor
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uP1590 Datasheet PDF






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