LTC4089 Datasheet, PDF (10/24 Pages) Linear Technology – USB Power Manager with High Voltage Switching Charger

LTC4089/LTC4089-5
BLOCK DIAGRA
D2
10 ^HVIN
BOOST
Q1
C3
SW
L1
10pF
V_C
10
+
+
–
–
OSCILLATOR
RQ
SQ
DDRRIIVVEERR
–
GM ₊
+
V_SET
V_SET PART NUMBER
3.6V LTC4089
5V LTC4089-5
–
D1
HVOUT
C1
ENABLE
R3
HVEN
10
C4
IN
10
1.8V
+– +–
+
350mV
75mV (RISING)
(LTC4089)
25mV (FALLING)
+
4.25V (RISING) –
3.15V (FALLING)
CURRENT LIMIT
HVPR
19
I_IN
1000
CLPROG
22
2k
1V +
CL
–
HPWR ^500mA/100mA
13
2µA
SOFT-START
IN
I_LIM CNTL
CURRENT CONTROL
I_LIM
ENABLE
DIE
TEMP 105°C
–+
TA
IN OUT BAT
CC/CV REGULATOR
CHARGER
ENABLE
25mV
IDEAL
DIODE
BAT
25mV
+
EDA
–
OUT
21
GATE
21
BAT
21
PROG
23
100k
V_NTC
15
10k
NTC
14
100k
1V
CHG
–
TOO COLD
+
NTC
–
TOO HOT
+
+
0.1V –
NTC ENABLE
CHARGE CONTROL
I_CHG
SOFT-START2
VOLTAGE DETECT
UVLO
NTCERR
CONTROL LOGIC
BAT UV
RECHRG
HOLD
RESET
GND
16
2µA
SUSP
11
0.25V
2.8V
BATTERY
UVLO
4.1V
RECHARGE
OSCILLATOR
CLK
COUNTER
STOP
TIMER
21
CHRG
18
C/10 ^EOC
4089 TA01
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10