AT1865

AT1865
Global Mixed-mode Technology Inc.
4+1 Channel DC-DC converter for DV
Features
General Description
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The AT1865 provide a complete power supply solution
for digital video. They improve performance, component count, and size compared to other multi-channel
controllers in 1-cell Li-Ion battery designs. On-chip
MOSFETs provide up to 92~95% efficiency for critical
power supplies. Channel 1/2/3/4 operate at one fixed
frequency of 1MHz to optimize size, cost, and efficiency. Channel 5 operate as LDO.
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1.8V ~ 5.5V BAT Input Voltage Operation.
3.0V ~ 5.5V VCC Input Voltage Operation.
95% Efficient DC/DC Converter.
Combine Step-Up and Step-Down for 90% Efficient Boost-Buck and Buck-Boost.
Highly Integrated 4+1 CH DC/DC with integrated Power MOSFETs.
CH2 Selectable Buck or Boost for Li-ion Battery Application.
4 Channel Built-in Synchronous Rectified Current-Mode PWM Converters.
Low Power Consumption (Sleep Mode) <10uA.
Built-In Short-circuit Protection (SCP) and
Over Current Protection (OCP) for MOSFETs.
Built-In Over Voltage Protection (OVP) and
Over Load Protection (OLP).
Built-In Soft-Start Function.
Built-In Power ON/OFF Sequence Control.
Built-In RTC LDO
Built-In RESET function
Fixed 1MHz Operating Frequency.
TQFN28 Package (4mm x 4mm).
Applications
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DV
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
AT1865RV1U
A1865
0°C to +85°C
TQFN4X4-28
Note: RV: TQFN4X4-28
1: Bonding Code
U: Tape & Reel
Pin Configuration
FB3
CTL3
PVCC3
24
23
22
FB1
SEQ
25
CTL1
27
26
PVCC1
28
AT1865
CH1
Synchronous Rectified
Current Mode Step-Up
LX1
1
21
LX3
RTC_IN
2
20
RESET
RTC_OUT
3
Thermal
Pad
19
CT
18
VREF
17
AGND
12
13
14
CTL4
PVCC4
PVCC2
FB4
LX4
11
VCC
15
SEL2
16
7
9
6
LX2
10
CTL5
FB2
5
CTL2
PVCC5
8
VOUT5
4
CH2
Selectable
Synchronous Rectified
Current Mode StepUp/Step-Down
CH3
Synchronous Rectified
Current Mode StepDown
CH4
Synchronous Rectified
Current Mode StepDown
AT1865 TQFN4X4-28
Note: Recommend connecting the Thermal Pad to
the Ground for excellent power dissipation.
CH5
LDO
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.3
Mar 17, 2010
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