RICOH RN5T614x Technical data
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
POWER MANAGEMENT SYSTEM DEVICE
RN5T614x
Product Specifications
Rev. 1.0
2011.10.06
RICOH COMPANY, LTD.
Electronic Devices Company
This specification is subject to change without notice.
©2010-2011 Rev. 1.0 Page 1
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
Table of Contents
1. Outline......................................................................................................................................................................... 4
2. Feature......................................................................................................................................................................... 4
3. Pin Configuration ........................................................................................................................................................6
4. Block Diagram ............................................................................................................................................................7
5. Pin Description............................................................................................................................................................8
6. Power Control ...........................................................................................................................................................10
6.1 Power Control Block Diagram..........................................................................................................................10
6.2 Power on and off...............................................................................................................................................11
6.3 Soft Reset Operation.........................................................................................................................................13
6.4 Stand-by Operation ...........................................................................................................................................14
6.5 UVLO (Under Voltage Lock Out) Electrical Characteristics ........................................................................... 15
6.6 TSHUT (Thermal Shutdown Circuit) Electrical Characteristics.......................................................................15
7. Voltage Detector .......................................................................................................................................................16
7.1 VBAT Detector (VD1) Electrical Characteristics.............................................................................................16
7.2 RESDET Detector (VD2) Electrical Characteristics.........................................................................................16
8. Regulator ...................................................................................................................................................................17
8.1 Regulator Table.................................................................................................................................................17
8.2 Step-down DC/DC Converter ...........................................................................................................................18
8.3 LDO ..................................................................................................................................................................22
9. Li-ion Battery Charger ..............................................................................................................................................26
9.1 Li-ion Battery Charger Block Diagram.............................................................................................................26
9.2 Explanation of Charge Block Operating ...........................................................................................................27
9.3 Charge Interrupt Request ..................................................................................................................................32
9.4 Li-ion Battery Charger Electrical Characteristics .............................................................................................33
10. Interrupt Controller (INTC).......................................................................................................................................35
10.1 Interrupt Controller Block Diagram..................................................................................................................35
10.2 Interrupt Timing Chart......................................................................................................................................36
10.3 Interrupt Request List........................................................................................................................................37
11. CPU Interface............................................................................................................................................................38
11.1 I2C-Bus Operation............................................................................................................................................38
11.2 I2C-Bus Data Transmission and its Acknowledge............................................................................................39
11.3 I2C-Bus Slave Address .....................................................................................................................................39
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RN5T614 POWER MANAGEMENT SYSTEM DEVICE
11.4 I2C-Bus Data Transmission Read Format ........................................................................................................40
11.5 I2C-Bus Data Transmission Write Format........................................................................................................40
11.6 I2C-Bus Internal Register Write-in Timing ......................................................................................................41
11.7 AC Characteristics of I2C-Bus..........................................................................................................................42
12. Registers....................................................................................................................................................................43
12.1 Power Control ...................................................................................................................................................44
12.2 Voltage Detector ...............................................................................................................................................45
12.3 Regulator...........................................................................................................................................................46
12.4 Li-ion Battery Charger......................................................................................................................................55
12.5 Interrupt Controller ...........................................................................................................................................60
13. Electrical Characteristics...........................................................................................................................................65
13.1 Absolute Maximum Ratings .............................................................................................................................65
13.2 Recommendation of Operating Conditions.......................................................................................................65
13.3 DC Characteristics ............................................................................................................................................66
14. Appendix...................................................................................................................................................................67
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RN5T614 POWER MANAGEMENT SYSTEM DEVICE
1. Outline
RN5T614 is the power management IC for GPS-PND/MID and Smart-Phone.
It integrates three high-efficiency step-down DCDC controllers, eight low dropout regulators, power control logic,
Li-ion Battery Charger, I2C-Bus Interface, voltage detections, thermal shut-down, UVLO and etc.
2. Feature
●System
9 Thermal Shutdown Function
9 Reset Detector Function
9 UVLO Function
9 I2C-Bus Interface @400kHz (Input voltage range: 1.7V-3.4V)
●High Efficiency Step-down DC/DC Converters
9 DC/DC1: 1.20V (0.9V to 1.5V/12.5mV steps) @1200mA with RAMP control (For Core)
9 DC/DC2: 1.15V (0.9V to 1.5V/12.5mV steps and 1.8V) @1000mA with RAMP control (For Logic)
9 DC/DC3: 1.8V (1.8V to 3.3V by external resistors) @500mA (For Memory)
9 DC/DC on/off control pin for DC/DC1 and DC/DC2
●Low Drop Voltage Regulators
9 LDO1:3.0V (Always-on) @10mA
9 LDO2:1.2V (0.9V/1.0V/1.1V/1.2V/1.3V) @30mA
9 LDO3:1.2V (0.9V/1.0V/1.1V/1.2V/1.3V) @30mA
9 LDO4:3.3V (1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @300mA
9 LDO5:1.8V (1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @300mA
9 LDO6:2.6V (1.2V/1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @150mA
9 LDO7:3.0V (1.2V/1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @150mA
9 LDO8:3.3V (1.8V/2.5V/2.6V/2.8V/2.85V/3.0V/3.3V) @150mA
●Li-ion Battery Charger
9 Support AC adapter charging
9 With the current limit protection and charge current control, the limited power can be efficiently
supplied to the system and the battery.
9 The system can power on even when Li-ion Battery is low voltage or open.
9 The device can withstand up to 6.5V on VCHG pin. However, it can withstand high voltage by
combining a high voltage protection IC (up to 28V by using BD6040 of ROHM).
9 Rapid timer and Trickle timer integrated.
9 Monitor for the battery thermistor built in.
9 No external MOSFET required.
9 If system loads over AC adapter current rating, the battery will supply the current to the system.
9 Chip temperature detection circuit for over temperature protection integrated.
●Package QFN0606-48
●Process CMOS
©2010-2011 Rev. 1.0 Page 4
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RN5T614 POWER MANAGEMENT SYSTEM DEVICE
◎Version List
Version No DC/DC Preset LDO Setting
LDO1: 3.0V
LDO2: Power-on
RN5T614A
RN5T614B
RN5T614C
RN5T614D
RN5T614E
RN5T614F
Note*: For the trimming of regulators, refer to Chapter 8.1 Regulator Table.
DC/DC1: 1.25V
DC/DC2: 1.20V
DC/DC1: 1.25V
DC/DC2: 1.20V
DC/DC1: 1.20V
DC/DC2: 1.80V
DC/DC1: 1.20V
DC/DC2: 1.80V
DC/DC1: 1.20V
DC/DC2: 1.15V
DC/DC1: 1.25V
DC/DC2: 1.20V
LDO3-5: Initial On
LDO5: 3.0V
LDO8: 3.0V
VREF: Power-on
LDO1: 3.0V
LDO2: Power-on
LDO3-5: Initial On
LDO5: 3.0V
LDO8: 3.0V
VREF: Power-on
LDO1: 3.0V
LDO2: Power-on
LDO3-5: Initial On
LDO5: 1.8V
LDO8: 3.3V
VREF: Power-on
LDO1: 1.8V
LDO2: Always-on
LDO3-5: Initial Off
LDO5: 1.8V
LDO8: 3.3V
VREF: Alwa
LDO1: 3.0V
LDO2: Power-on
LDO3-5: Initial On
LDO5: 1.8V
LDO8: 3.3V
VREF: Power-on
LDO1: 3.0V
LDO2: Power-on
LDO3-5: Initial On
LDO5: 3.0V
LDO8: 3.3V
VREF: Power-on
DCDCEN*
Valid Condition
DCDCEN12 :
2ms after the start of power-on
DCDCEN3 :
Invalid by trimming
DCDCEN12 :
After RESETO is released
DCDCEN3 :
Invalid by trimming
DCDCEN12 :
After RESETO is released
DCDCEN3 :
Invalid by trimming
DCDCEN12 :
After RESETO is released
DCDCEN3 :
After RESETO is released
s-on
DCDCEN12 :
After RESETO is released
DCDCEN3 :
Invalid by trimming
DCDCEN12 :
After RESETO is released
DCDCEN3 :
Invalid by trimming
For the detail of Sequence, refer to Appendix.
Sequence
Sequence1
Sequence2
Sequence2
Sequence4
Sequence2
Sequence3
The initial value of the following pages is based on RN5T614E!!
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RN5T614 POWER MANAGEMENT SYSTEM DEVICE
3. Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
Fig 3-1 Package Information (QFN0606-48pin)
Pin No. Name Pin No. Name Pin No. Name Pin No. Name
1 VOUT5 13 TEST1 25 DCDCEN12 37 VSYS1
Top View
QFN0606-48
GND *1
36
35
34
33
32
31
30
29
28
27
26
25
2 VIN2 14 TEST2 26 INTB 38 VSYS2
3 VOUT6 15 VFB1 27 PSHOLD 39 VSYS3
4 VOUT7 16 LX1 28 VDDIO 40 VCHG
5 VIN3 17 VINP1 29 SDA 41 CHGLED
6 VOUT8 18 VINP2 30 SCL 42 VOUTD
7 VINA 19 LX2 31 THERMBAT 43 VREF
8 RESETO 20 VFB2 32 VTHM 44 VOUT3
9 BATDET 21 VINP3 33 VCHGREG 45 VOUT2
10 EXTON 22 LX3 34 IMONI 46 VIN1
11 PWRON 23 VFB3 35 VBAT1 47 VOUT4
12 ONOB 24 DCDCEN3 36 VBAT2 48 VOUT1
Note*1: Tab on the bottom side must be connected to GND.
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RN5T614 POWER MANAGEMENT SYSTEM DEVICE
4. Block Diagram
VCHG
VSYS1
VSYS2
VSYS3
VBAT1
VBAT2
BATDET
THERMBAT
VTHM
IMONI
CHGLED
VCHGREG
VDDIO
DCDCEN12
DCDCEN3
INTB
SDA
SCL
PSHOLD
EXTON
PWRON
ONOB
VIN1
VREF
VOUTD
VOUT1
VOUT2
VOUT3
Li-ion Battery Charge
*1
Power Pass
Control
Li-ion Battery
Charger
VD1
Charge
Control logic
Charge REG
INTC
I2CIF
Power ON
Sequence
OSC
VREF
LDODIG
(for Internal Use)
(Always ON)
LDO1(10mA)
(Always ON)
LDO2(30mA)
DAC
LDO3(30mA)
DAC
DC/DC1
for Core
(1200mA)
RAMP Control
DAC
ON/OFF
DC/DC2
for Logic
(1000mA)
RAMP Control
DAC
ON/OFF
DC/DC3
for Memory
(500mA)
ON/OFF
LDO5(300mA)
DAC
LDO6(150mA)
DAC
LDO7(150mA)
DAC
LDO8(150mA)
DAC
VD2
UVLO
VINA
VINP1
LX1
VFB1
VINP2
LX2
VFB2
VINP3
LX3
VFB3
VIN2
VOUT5
VOUT6
VIN3
VOUT7
VOUT8
RESETO
L1
C1
L2
C2
L3
Cf
R1 R2
GND
GND
C3
GND
VOUT4
TEST1
LDO4(300mA)
DAC
Thermal
Shut-Down
TEST2
GND
Note*1 : Input pins become valid after RESETO is released. DCDCEN3 pin is invalid.
Fig 4-1 Block Diagram
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RN5T614 POWER MANAGEMENT SYSTEM DEVICE
5. Pin Description
No. Name I/O Function I/F Level Notes
VOUT5 O LDO5 output -
1
VIN2 PWR Power supply for LDOs
2
VOUT6 O LDO6 output -
3
VOUT7 O LDO7 output -
4
VIN3 PWR Power supply for LDOs
5
VOUT8 O LDO8 output -
6
VINA PWR
7
RESETO O Reset output. Voltage detection of VOUT8 output
8
BATDET O Battery monitor output
9
10 EXTON I External power on signal input VIN
PWRON I External power on signal input
11
ONOB O
12
TEST1 - For TEST - Connect to GND
13
TEST2 - For TEST - Connect to GND
14
VFB1 I DC/DC1 Output voltage feedback input -
15
Power supply for DC/DC’s Analog Block &
Interface IO
PWRON monitor. Inverted open-drain output signal
of PWRON
VIN
VIN
VIN
VIN
VIN
VIN
VIN
Nch Open Drain
Nch Open Drain
Nch Open Drain
LX1 O DC/DC1 switch output -
16
VINP1 PWR Power supply for DC/DC1
17
VINP2 PWR Power supply for DC/DC2
18
LX2 O DC/DC2 switch output -
19
VFB2 I DC/DC2 Output voltage feedback input -
20
VINP3 PWR Power supply for DC/DC3
21
LX3 O DC/DC3 switch output -
22
VFB3 I DC/DC3 Output voltage feedback input -
23
DCDCEN3 I DC/DC3 ON/OFF input
24
DCDCEN12 I DC/DC1,2 ON/OFF input
25
INTB O Interrupt request output
26
PSHOLD I Power on maintenance signal input VDDIO
27
Power supply for Interface IO
VDDIO PWR
28
SDA I/O I2C-Bus Data I/O
29
Note*: Supply the power before the point where
2ms after the power-on sequence starts.
VIN
VIN
VIN
VDDIO
VDDIO
VDDIO
VDDIO
VDDIO
Nch Open Drain
Nch Open Drain
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RN5T614 POWER MANAGEMENT SYSTEM DEVICE
No. Name I/O Function I/F Level Notes
SCL I I2C-Bus Clock input
30
THERMBAT I Battery thermistor input -
31
VDDIO
Thermistor temperature detection output & phase
VTHM O
32
-
compensation
Connect only
VCHGREG O Capacitor connection for built-in Regulator -
33
Capacitor load
IMONI O SW2 current monitor -
34
VBAT1 PWR Li-ion battery input/output1 VBAT
35
VBAT2 PWR Li-ion battery input/output2 VBAT
36
VSYS1 PWR System power supply1 VSYS
37
VSYS2 PWR System power supply2 VSYS
38
VSYS3 PWR System power supply3 VSYS
39
VCHG PWR Connected to AC Adapter VCHG
40
CHGLED O Charge status indicator VSYS Nch Open Drain
41
Connect only
VOUTD O Capacitor connection for built-in Regulator -
42
Capacitor load
VREF O Bypass capacitor connecting pin -
43
VOUT3 O LDO3 output -
44
VOUT2 O LDO2 output -
45
VIN1 PWR Power supply for LDOs
46
VOUT4 O LDO4 output -
47
VOUT1 O LDO1 output -
48
VIN
Connect only
Capacitor load
Tab Ground.
GND GND
-
-
Tab on the bottom side must be connected to GND.
Table 5-1 Pin Description
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RN5T614 POWER MANAGEMENT SYSTEM DEVICE
6. Power Control
6.1 Power Control Block Diagram
to <Reset Control>
L level
detector
rSLEEP (default0)
(↑2.8V)
EN
Over Heat
(Power Off)
※Select by Trimming
Charge
Control
rLDO2ON (default1)
rLDO3ON (default1)
※Select by Trimming
rLDO4ON (default1)
※Select by Trimming
rLDO5ON (default1)
※Select by Trimming
rLDO6ON (default0)
rLDO7ON (default0)
Interrupt
Flag
STRC
※Select by Trimming
Power ON/OFF
Internal
OSC
※Select by Trimming
CLK32K from internal clk
Voltage Cont.
Voltage Cont.
Voltage Cont.
Voltage Cont.
Voltage Cont.
Voltage Cont.
Voltage Cont.
soft reset by <PSHOLD L level detector>
reset by <DC/DC_limit current detector>
Reset
Control
VOUT8 x85%
H:ON
H:ON
H:ON
H:ON
H:ON
H:ON
H:ON
H:ON
rDD1ON (default0)
rDD1ENCTL (default0)
rDD2ON (default0)
rDD2ENCTL (default0)
rDD3ON (default1)
Fix_H
※Select by Trimming
MUX
RAMP Cotroller
MUX
RAMP Cotroller
H:ON
H:ON
H:ON
©2010-2011 Rev. 1.0 Page 10
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
6.2 Power on and off
RN5T614 can be powered on by factors as below.
1. PWRON (external pin)
2. EXTON (external pin)
3. Charging (Shift to Rapid-Charge state)
(a) Power-on by external signal: PWRON (or EXTON) pin
When PWRON pin becomes “H”, the power-on sequence starts synchronizing with the internal clock (32 kHz).
At the same time, ONOB pin becomes “L”.
VREF, DCDC3, LDO2, DCDC1/2, LDO8, LDO5, LDO3, and LDO4 power on following the power-on
sequence in the timing chart below. RESETO released 120ms after LDO8 turns on. After RESETO is released,
PSHOLD is turned to “H” and the power-on state is maintained while PWRON is “H”.
VIN*
VOUT1
PWRON
(or EXTON)
(or Charging)
PSHOLD
VREF
DCDC3(*1)
VOUT8
VOUT5
VOUT3
VOUT4
VOUT2
DCDCEN12
from AP
DCDC1/2
UVLO
Power-on by PWRON(or EXTON or Charging)
0.5ms
12clk
12clk
4clk
4clk
(invalid) (valid)
The power needs to be supplied to VDDIO.
8clk
4clk
0.2ms or more
Holding Power-on
by PSHOLD
Power-on by PWRON
(or EXTON or Charging)
(invalid)
LDO6,7
RESETO
120ms
I2C Enabled
Note*: Internal clk (32kHz±20%)
Note*1: DCDCEN3 pin is invalid by trimming
Fig 6-1 Power-on/off Timing (Sequence2)
©2010-2011 Rev. 1.0 Page 11
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
PSHOLD can only hold PMIC powered-on but cannot turn on at the timing shown below.
PWRON
Power-on by PWRON(or EXTON or Charging)
(or EXTON)
(or Charging)
PSHOLD
0.5ms
Power-on cannot be carried out
DCDC3
12clk
VOUT8
12clk
VOUT5
4clk
VOUT3
4clk
VOUT4
4clk
VOUT2
8clk
DCDC1,2
by PSHOLD
RESETO
120ms
Note*: Internal clk (32kHz±20%)
(b) Power-off operation
When power-on factor and PSHOLD become "L", all DC/DC and LDO turn off except LDO1 and LDODIG.
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RN5T614 POWER MANAGEMENT SYSTEM DEVICE
6.3 Soft Reset Operation
PWRON
(or EXTON)
(or Charging)
PSHOLD
0.2ms or more
Soft reset by PSHOLD
RESETO
80ms
320ms
120ms
VREF
DCDC3
8532
4
VOUT8/5/3/4/
2
Power-on Sequence Start
DCDCEN12
DCDC1/2
(invalid)
Power-on Sequence Start
VOUT6/7
Note*: Internal clk (32kHz±20%）
Fig 6-2 Soft Reset Timing
When PWRON becomes “H”, soft reset can be performed by turning PSHOLD to “L”.
When PSHOLD becomes “L”, RESETO outputs “L” after 80ms. And then, all DC/DC and LDO turn off except
LDO1 and LDODIG. DC/DC3 turns on again after 320ms. Then after that, each LDO turns on as the normal
power-on sequence.
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RN5T614 POWER MANAGEMENT SYSTEM DEVICE
6.4 Stand-by Operation
Fig 6-3 Stand-by Timing
When SLEEP bit is “1”, and power-on factor and PSHOLD become “L”, all DC/DC and LDO turn off (except
LDO1 and LDODIG) with maintaining DC/DC3 turned on. (Note*)
When “H” signal is input to PWRON pin or EXTON pin, the normal power-on sequence starts. SLEEP bit is reset
by UVLO.
Note*: Stand-by operation will not be executed at the following conditions: Soft Reset, RESDET detection, and
latch protection of DC/DC.
©2010-2011 Rev. 1.0 Page 14
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
6.5 UVLO (Under Voltage Lock Out) Electrical Characteristics
When the system cannot operate due to the low battery voltage, UVLO turns off the system (SLEEP bit is reset by
UVLO).
Operating Conditions (unless otherwise specified) T
Symbol Parameter Condition Min Ty p Max Units
V
Under voltage lock out threshold VIN rising 2.8 V
Release
V
Under voltage lock out threshold VIN falling -3% 2.7 +3% V
Detect
V
UVLO Hysteresis - 100 mV
HYS
= 25 degrees C
a
Table 6-1 UVLO Electrical Characteristics
6.6 TSHUT (Thermal Shutdown Circuit) Electrical Characteristics
The thermal shutdown circuit turns off the system and prevents the chip from damaging when overheating is
detected. When the temperature changes back to Return Temperature, the power-on sequence is started again if there
is power-on factor. If there is no power-on factor, the state remains power-off.
Operating Conditions (unless otherwise specified) VIN = 3.6V
Symbol Parameter Condition Min Ty p Max Units
T
DET
T
Return Temperature - 110 degrees C
RET
ISS Supply Current - 7 μA
Detected Temperature - 135 degrees C
Table 6-2 Thermal Shutdown Circuit Electrical Characteristics
©2010-2011 Rev. 1.0 Page 15
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
7. Voltage Detector
7.1 VBAT Detector (VD1) Electrical Characteristics
After VBAT pin rises, BATDET signal turns to “H” after 100ms (Min.) from the VBAT Detector is released.
The default is 3.3V, but it can be changed by the register.
BATDET is Nch-opendrain output pin, and if it is used, pull up the pin with the voltage not exceeding VIN power.
VRelease1
VBAT
VDetect1
BATDET
130ms±30ms
Operating Conditions (unless otherwise specified) T
= 25 degrees C
a
Symbol Parameter Conditions Min. Typ. Max. Units
V
VD1 Threshold Voltage VBAT rising -3% 3.3 (*1) +3% V
Release1
V
VD1 Threshold Voltage VBAT falling 3.1 V
Detect1
V
VD1 Hysteresis - 0.2 V
Hys1
Note*1: The threshold voltage is set by setting the register.
Table 7-1 VD1 Electrical Characteristics
7.2 RESDET Detector (VD2) Electrical Characteristics
The RESDET Detector detects LDO8 voltage.
At the RESDET, “L” is output from RESETO pin. 120ms after RESDET is released, “H” is output.
After RESDET is released, DC/DC and LDO turn off except LDO1 and LDODIG when LDO8 voltage drops lower
than the detection voltage. After DC/DC and LDO are turned off, the power-on sequence is started again if there is
power-on factor. If there is no power-on factor, the state remains power-off.
Operating Conditions (unless otherwise specified) V
= 3.6V, Ta = 25 degrees C
IN
Symbol Parameter Condition Min Typ Max Units
Vout8
V
VD2 Threshold Voltage Vout8 rising
Release2
-3%
×85%
+3% V
(*1)
V
VD2 Hysteresis - 100 mV
Hys2
Note*1: The threshold voltage is set by setting the register.
Table 7-2 RESDET Electrical Characteristics
©2010-2011 Rev. 1.0 Page 16
p
p
(*4)
p
)
p
)
(
)
(
)
(
)
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
8. Regulator
8.1 Regulator Table
DC/DC1 DC/DC2 DC/DC3
Initial Value 1.20V (*1) 1.15V (*2) 1.8V
Output Voltage Range 0.9～1.5V
12.5mVste
Output Current (MAX) 1200mA 1000mA 500mA
External Inductor
2.2μH2.2μH2.2μH
0.9～1.5V,1.8V
12.5mVste
1.8～3.3V
External Capacitor
S
ec-B(*4
Output Control I2C
(with RAMP Control)
ON/OFF Control I2C or DCDCEN12 I2C or DCDCEN12 I2C or DCDCEN3 (*3)
Initial State ON ON ON
For use (Core) (Logic) (Memory)
Note*1: Selected by trimming (Initial Value:1.00/1.10/1.20/1.25/1.30V/1.425V)
Note*2: Selected by trimming (Initial Value:0.95/1.05/1.15/1.20/1.50/1.80V)
Note*3: Selected by trimming (DCDCEN3 pin is valid or invalid)
Note*4: Recommended component
Bypass Capacitors for DC/DC1,2 10uF：C1608JB0J106M(TDK)
Bypass Capacitors for DC/DC3 4.7uF：C1608JB1A475KT(TDK)
Inductor For DCDC1,2 2.2uH：NRH2410T2R2MN(TAIYO-YUDEN)
Inductor For DCDC3 2.2uH：MLP2012S2R2M(TDK)
Input Capacitors for DC/DC 2.2uF：LMK107BJ225KA-T(TAIYO-YUDEN)
10μF10μF4.7μF
I2C
(with RAMP Control)
External R
Table 8-1 Regulator Table (DC/DC)
LDO1 LDO2 LDO3 LDO4 LDO5 LDO6 LDO7 LDO8
Initial Value 3.0V (*1) 1.2V 1.2V 3.3V 1.8V (*1) 2.6V 3.0V 3.3V (*1)
Output Voltage Range - 0.9～1.3V 0.9～1.3V 1.8～3.3V 1.8～3.3V 1.2～3.3V 1.2～3.3V 1.8～3.3V
Output Current (MAX) 10mA 30mA 30mA 300mA 300mA 150mA 150mA 150mA
External Capacitor
S
ec-B(*4
Output Control - I2C I2C I2C I2C I2C I2C I2C
ON/OFF - I2C I2C I2C I2C I2C I2C -
Initial State Keep ON ON (*2) ON (*3) ON (*3) ON (*3) OFF OFF ON
For use (RTC) (Alive)
Note*1: Selected by trimming (LDO1:3.0/1.8V, LDO5:3.0V/1.8V, LDO8:3.0V/3.3V)
Note*2: Selected by trimming (Initial State:Power_on or Keep ON)
Note*3: Selected by trimming (Initial State:Power_on or OFF)
Note*4: Recommended component
Bypass Capacitors for LDO 1uF：GRM155B31A105KE15
1.0μF1.0μF1.0μF1.0μF1.0μF1.0μF1.0μF1.0μF
PLL
(USB OTG) (Memory)
Peripheral
(USB)
MMC
(Host I/F) (LCD) (System)
Table 8-2 Regulator Table (LDO)
©2010-2011 Rev. 1.0 Page 17
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
8.2 Step-down DC/DC Converter
RN5T614 has two PWM/PFM/PSM step-down DC/DC converters and one One-shot PWM DC/DC converter. They
employ external inductor and capacitor for smoothing output voltage. DC/DC3 sets output voltage by the external
resistance.
8.2.1 Step-down DC/DC1 and DC/DC2 Converte r
RN5T614 has CMOS-based PWM/PFM/PSM step-down DC/DC1 (DC/DC2) converter with a low supply current.
PWM/PFM/PSM mode is controlled in two methods. One is AUTO mode that automatically switches PWM/PFM, and
the other is the register setting that sets AUTO/PWM/PSM through I2C. The output voltage is also programmable by
DD1DAC (DD2DAC) register.
Since DD1MODE (DD2MODE) bit and DD1DAC (DD2DAC) are reset when DC/DC1 (DC/DC2) turns off, the next
activation starts at 1.20V that is the default of DD1DAC (1.15V that is the default of DD2DAC).
DC/DC1 and DC/DC2 converters have RAMP control function.
RN5T614 integrates the latch protection function to avoid any malfunctions by over current. The current limit circuit
monitors over current with LX1 (LX2) clock cycle.
When over current is detected and continues for a certain time (10ms), RESETO outputs “L”. And then, all DC/DC and
LDO turn off except LDO1 and LDODIG.
After DC/DC and LDO are turned off, the power-on sequence is started again if there is power-on factor. If there is no
power-on factor, the state remains power-off.
DC/DC1 and DC/DC2 converters can be easily composed with only few external components such as inductor,
capacitor and etc. For the output capacitor, the ceramic type should be used for reducing the ripple voltage.
8.2.1.1 Step-down DC/DC1 and DC/DC2 Conve r te rs Bl ock Diagram
Fig 8-1 Step-down DC/DC1 and DC/DC2 Converter Block Diagram
©2010-2011 Rev. 1.0 Page 18
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
8.2.1.2 RAMP Control Operation
This function starts by setting DD1(2)DAC register. The ramp rate is controllable by RAMP1(2)SLOP bit.
Set DD1(2)DAC register
Set DD1(2)DAC register
Enable
DC/DC1(2)
Output Voltage
Output Ramp Rate
Output Ramp Rate
Soft Start Slew Rate
Fig 8-2 Ramp up/down Control Timing Chart
©2010-2011 Rev. 1.0 Page 19
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
8.2.1.3 Step-down DC/DC1 and DC/DC2 Converter Electrical Characteristics
Operating Conditions (unless otherwise specified) V
= 3.6V, L=2.2μH, C
IN
= 10μF, Ta = 25 degrees C
OUT
Symbol Parameter Condition Min Typ Max Units
VIN Input voltage range - 3.1 3.6 5.5 V
V
OUT
Vaccu
-40 degrees C < T
Range of output voltage
Voltage setting step width
Output voltage accuracy
1mA < I
3.1V < V
< Ilx,
OUT
< 5.5V
IN
< 85 degrees
a
DC/DC1
DC/DC2
PFM/PSM
Mode
PWM
Mode
1mA < I
OUT
1mA < I
OUT
-
V
=0.9V~1.0V
OUT
V
=1.0V~1,5V,1.8V
OUT
V
=0.9V~1.0V
OUT
V
=1.0V~1.5V,1.8V
OUT
< 1200mA
< 1000mA
0.9 1.20 1.5
V
0.9
1.15
1.8
12.5 mV
-27 8.5 44 mV
-2.5 1 4.5 %
-35 35 mV
-3.5 3.5 %
Vrip Output ripple voltage PFM/PSM Mode Iout=1mA 25 mV
ΔV
OUT
/ΔTa
Output voltage temperature
coefficient
-40 degrees C < Ta < 85 degrees C ±100
ppm/
degreesC
Fosc Switching frequency - 2.2 MHz
Ilx Maximum output current
Ilim Limit current
Vpeak Output transition response
Tprot Protection delay time
Iss Consumption current
DC/DC1(AUTO/PWM Mode)
DC/DC2(AUTO/PWM Mode)
DC/DC1,2(PSM Mode)
DC/DC1
DC/DC2
10→500mA@ΔT=1μs, V
OUT
-
AUTO Mode I
PSM Mode I
V
= 1.20V, I
OUT
OUT
OUT
OUT
=0mA
=0mA
=1mA
=1.2V
1200 mA
1000 mA
10 mA
1800 mA
1500 mA
50 mV
10 ms
50 μA
25 μA
75 %
Η1 Efficiency peak
V
= 1.20V, Iout =η_peak
OUT
85 %
Table 8-3 DC/DC1 and DC/DC2 Electrical Characteristics
©2010-2011 Rev. 1.0 Page 20
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
8.2.2 Step-down DC/DC3 Converter Electrical Characteristics
Operating Conditions (unless otherwise specified)
Symbol Parameter Condition Min Typ Max Units
VIN
V
OUT
Ilx Maximum output current
Iss
I
OFF
Ilim
VFB
ΔVFB/ΔVIN
ΔVFB/ΔIlx
ΔVFB/ΔTa
tr Soft-start Time - 120 μs
Input Voltage Range
Output Voltage Range
Consumption Current
Standby Current
Limit detection Current
FB Voltage
FB Line Regulation
FB Load Regulation
FB Voltage
Temperature Coefficient
V
OUT
-40 degrees C≦Ta≦+85 degrees C
VIN = 3.6V, L=2.2μH, C
3.1V≦VIN≦5.5V
= VFB =3.6V
V
IN
Ilx =0mA, no switching
OFF state
-
VIN = VFB =3.6V, Ilx =1mA
+0.5≦VIN≦5.5V, Ilx = Ilxmax / 2
1mA≦Ilx≦500mA
OUT
= 4.7μF, Ta = 25 degrees C
3.1 5.5 V
1.8 3.3 V
500 mA
70 μA
1 μA
800 mA
-1.5% 0.608 +1.5% V
10 mV
2 mV
±100
Table 8-4 DC/DC3 Electrical Characteristics
ppm/
degrees
C
Fig 8-3 DC/DC3 Block Diagram
Output Voltage R1 R2 Cf Notes
3.3V 120kΩ 27kΩ 180pF
2.5V 150kΩ 47kΩ 150pF
1.8V 220kΩ 110kΩ 100pF
Table 8-5 DC/DC3 External Components Example
©2010-2011 Rev. 1.0 Page 21
RN5T614 POWER MANAGEMENT SYSTEM DEVICE
8.3 LDO
RN5T614 has eight LDOs. LDO1 for RTC is always on, and it has the reverse-current prevention circuit.
VREF circuit is only for the internal reference voltage, so it cannot be used as the external reference voltage.
For optimized phase compensation, the bypass capacitor must be the ceramic type.
8.3.1 LDO Electrical Characteristics
8.3.1.1 LDO1 Electrical Characteristics
Operating Conditions (unless otherwise specified) V
Symbol Parameter Condition Min Typ Max Units
VIN Input Voltage Range - 3.1 3.6 5.5 V
V
Output Voltage (*2)
OUT
I
Output Current - 10 mA
OUT
I
SHT
ΔV
/ΔVIN Line Regulation
OUT
ΔV
/ΔI
OUT
OUT
Short Current
Load Regulation
Output Voltage
ΔV
OUT
/ΔTa
Temperature
Coefficient
ISS Supply Current (*1) ON 1 3 μA
IRR Reverse Current V
3.1V≦V
50μA≦I
+0.2V≦VIN≦5.5V
V
OUT
I
OUT=IOUTMAX
50μA≦I
-40 degrees C≦T
=3.0V & VIN =0V 0.15 μA
OUT
= 3.6V, C
IN
≦5.5V
IN
≦10mA
OUT
V
=0V 30 mA
OUT
/2
≦10mA
OUT
≦85 degrees C
a
= 1.0μF, Ta = 25 degrees C
OUT
-3%
3.0 /
1.8
3
30 mV
±100
+3% V
mV
degrees C
ppm/
Table 8-6 LDO1 Electrical Characteristics
Note*: Bypass capacitor: 1.0μF, in mounted state.
For optimized phase compensation, the bypass capacitor must be the ceramic type.
Note*1: The consumption current of the reverse protection is not included.
Note*2: Initial value selected by trimming (3.0V or 1.8V)
©2010-2011 Rev. 1.0 Page 22
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