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参数资料
| 型号： | ADP3402ARU |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 电源管理 |
| 英文描述： | Replaced by BQ29412 : Voltage Protection for 2-,3-or,4-Cell Lion Batteries (2nd Protection) 8-SM8 |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO28 |
| 封装： | 6.10 MM, THERMALLY ENHANCED, TSSOP-28 |
| 文件页数： | 9/12页 |
| 文件大小： | 277K |
| 代理商： | ADP3402ARU |
ADP3402
–9–
REV. 0
ANALOG GND
DIGITAL AND
SIM GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
2.2
m
F
100nF
28
27
26
25
23
22
21
20
19
18
17
16
15
ADP3402
100
V
10
m
F
R1
CHARGER INPUT
R2
CAPACITOR-TYPE
BACKUP COIN CELL
10
m
F
SIM PIN OF
GSM PROCESSOR
2.2
m
F
10
m
F
24
0.22
m
F
100nF
10
m
F
CLK TO SIMCARD
RST TO SIMCARD
I/O TO SIM CARD
100nF
1 Li-ION OR
3 NiMH
CELLS
GSM
PROCESSOR
GSM
PROCESSOR
VBAT
VCC
PWRONKEY
ANALOGON
PWRONIN
ROWX
CHRON
VRTC
CAP–
SIMBAT
DATAIO
RESETIN
CLKIN
SIMGND
AGND
VCCA
REFOUT
VTCXO
DGND
RESCAP
CAP+
VSIM
CLK
SIMON
SIMPROG
RST
I/O
RESET
Figure 15. Typical Application Circuit
FREQUENCY – Hz
600
500
010
100k
100
V
1k
10k
400
300
200
100
FULL LOAD
MLCC CAPS
VCCA
TCXO
REF
Figure 14. Output Noise Density
THEORY OF OPERATION
The ADP3402 is a power management chip optimized for use
with GSM baseband chipsets in handset applications. Figure 1
shows a block diagram of the ADP3402.
The ADP3402 contains several blocks:
Four Low Dropout Regulators (Digital, Analog, Crystal
Oscillator, Real-Time Clock)
Reset Generator
Buffered Precision Reference
SIM Interface Logic Level Translation (3 V/5 V)
SIM Voltage Supply
Power On/Off Logic
Undervoltage Lockout
These functions have traditionally been done either as a discrete
implementation or as a custom ASIC design. ADP3402 combines
the benefits of both worlds by providing an integrated standard
product solution where every block is optimized to operate in a
GSM environment while maintaining a cost competitive solution.
Figure 15 shows the external circuitry associated with the ADP3402.
Only a few support components, mainly decoupling capacitors,
are required.
Input Voltage
The input voltage range for ADP3402 is 3 V to 7 V and optimized
for a single Li-Ion cell or three NiMH/NiCd cells. The ADP3402
uses Analog Devices’ patented package thermal enhancement tech-
nology, which allows 15% improvement in power handling capabil-
ity over standard plastic packages. The thermal impedance (
θ
JA
) of
the ADP3402 is 60
°
C/W. The charging voltage for a high capacity
NiMH cell can be as high as 5.5 V. Power dissipation should be
calculated at maximum ambient temperatures and battery voltage in
order not to exceed the 125
°
C maximum allowable junction tem-
perature. Figure 16 shows the maximum total LDO output current
as a function of ambient temperature and battery voltage.
However, high battery voltages normally occur only when the
battery is being charged and the handset is not in conversation
mode. In this mode there is a relatively light load on the LDOs.
A fully charged Li-Ion battery is 4.25 V, where the LDOs deliver
the maximum 240 mA up to the max 85
°
C ambient temperature.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADP3402ARU-REEL | 制造商:Analog Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述:GSM POWER MANAGEMENT SYSTEM - Tape and Reel |
| ADP3403ARU-REEL | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel 制造商:Analog Devices 功能描述: |
| ADP3404 | 制造商:AD 制造商全称:Analog Devices 功能描述:GSM Power Management System |
| ADP3404ARU | 制造商:Analog Devices 功能描述:1-CHANNEL POWER SUPPLY SUPPORT CKT, 28 Pin Plastic SMT |
| ADP3404ARU-REEL | 制造商:Analog Devices 功能描述:GSM Power Management System Li-Ion/NiMH 0.175mA 2.45V 28-Pin TSSOP T/R 制造商:Rochester Electronics LLC 功能描述:GSM POWER MANAGEMENT SYSTEM - Tape and Reel |
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