STPMIC25BPQR datasheet(15/145 Pages) STMICROELECTRONICS

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3.4.6

LDO3

Table 12. Electrical and timing parameter specifications (LDO3)

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

LDO3 normal mode (general purpose or lpDDR VDD1 backup)

VLDOIN

Main input voltage range

2.8

5.5

VLDOOUT

Output voltage

VLDOIN > VLDOOUT + VLDODROP

programmable value.

0.9 to 4.0

Voltage programming step

100

VLDOOUT-ACC

Output voltage accuracy

VLDOIN = 2.8 V or 5.0 V, 1.7 V < VLDOOUT < 3.3 V

100 µA < ILDOOUT < 120 mA

-2

ILDOLIM

Output current limitation

2.8 V < VLDOIN < 5.5 V

120

180

ILDOQ

Total quiescent current

ILDOOUT = 0 mA

µA

ILDOIN_LKG

Input leakage current

LDO output disabled, Tj=25 °C

VLDODROP

Dropout voltage

VLDOOUT = 2.9 V, ILDOOUT = 100 mA

120

200

VLDOOUT-LO

Load transient regulation

ILDOOUT = 100 µA to 50 mA, tR = tF = 1 µs

VLDOOUT-LI

Line transient regulation

VLDOIN = 3.0 V to 3.6 V, tR = tF = 10 μs

PSRRLDO

Power supply rejection

ratio

ΔVLDOIN = 300 mVPP, f = [0.1:20] kHz, Tj = 25 °C,

ILDOOUT = 50 mA

ΔVLDOIN = 300 mVPP, f = [20:100] kHz, Tj = 25 °C,

ILDOOUT = 50 mA

tSSLDO

Soft-start duration

2.8 V < VLDOIN < 5.5 V, 0 < ILDOOUT < 1 mA

COUT = 4.7 µF, VOUT = 1.8 V

160

µs

VLDOOUT-SO

Startup overshoot

2.8 V < VLDOIN < 5.5 V,

1.7 V < VLDOOUT < 3.3 V ILDOOUT < 10 µA

tSDLDO

Shutdown duration

Pull-down enabled, VLDOOUT = 3.3 V to VLDOOUT = 0.2 V,

ILDOOUT = no load

1.5

LDO3 sink-source mode (DDR VTT supply)

VLDOIN = VOUT6 = 1.2 V, VIN = 5.0 V, VBUCK6IN = 5.0 V, VLDOOUT = VREFDDR = VOUT6/2, Tj = -40 °C to +125 °C, recommended BOM, unless

otherwise specified

VLDOIN-SS

Input voltage range

1.1

1.2

1.6

VLDOOUT-SS

Output voltage

VREFDDR

VLDOOUT-ACC-SS Output voltage accuracy

1.1 V < VLDOIN < 1.6 V, -215 mA < ILDOOUT < +215 mA

-1.5

+1.5

ILDOOUT-SS

Continuous output current 1.1 V < VLDOIN < 1.6 V

120

mARMS

ILDOLIM-SS

Output current limitation

VLDOIN = 2.8 V to 5.5 V

±230

±500

ILDOQ-SS

Total quiescent current

ILDOOUT = 0 mA

µA

VLDOOUT-LO-SS Load transient regulation

ILDOOUT = ± [0:50] mA, tR = tF = 250 ns

VLDOOUT-LI-SS

Line transient regulation

VLDOIN = VOUT6 = 1.2 V ±30 mV, tR = tF = 10 μs

tSSLDO-SS

Soft-start duration

1.1 V < VLDOIN < 1.6 V, |ILDOOUT| < 1 mA, COUT = 10 µF

µs

VLDOOUT-SO-SS Startup overshoot

1.1 V < VLDOIN < 1.6 V, VLDOOUT = VREFDDR,

ILDOOUT = 10 µA

STPMIC25

Electrical and timing characteristics

DS14278 - Rev 3

page 15/145

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